Question

The Radio Shop sells two popular models of portable sports radios: model A and model B....

The Radio Shop sells two popular models of portable sports radios: model A and model B. The sales of these products are not independent of each other (in economics, we call these substitutable products, because if the price of one increase, sales of the other will increase). The store wishes to establish a pricing policy to maximize revenue from the products. A study of price and sales data shows the following relationships between the quantity sold (N) and prices (P) of each model (i.e. PA → Price of model A, NA → Number of model A sold, etc.):

NA = 20 – 0.62PA + 0.30PB

NB = 29 + 0.10PA – 0.60PB

  1. a) Construct a model for the total revenue (total price*quantity sold) and implement it on a

    spreadsheet.

  2. b) Develop a two-way data table to estimate the optimal prices for each product to

    maximize total revenue.

  3. c) Use Solver to find the optimal prices.

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Answer #1

a)

Na Number of model A sold =20 - 0.62*C3 + 0.3*C4
Nb Number of model B sold =29 + 0.1*C3- 0.6*C4
Pa Price of model A 0
Pb Price of model B 0
Total Revenue =C1*C3+C2*C4

b) Two way data table is as follows-

0.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0
0.0 0.0 19.4 37.5 54.4 70.1 84.5 97.7 109.6 120.3 129.8 138.0 145.0 150.7 155.2 158.5 160.5
1.0 28.4 48.2 66.7 84.0 100.1 114.9 128.5 140.8 151.9 161.8 170.4 177.8 183.9 188.8 192.5 194.9
2.0 55.6 75.8 94.7 112.4 128.9 144.1 158.1 170.8 182.3 192.6 201.6 209.4 215.9 221.2 225.3 228.1
3.0 81.6 102.2 121.5 139.6 156.5 172.1 186.5 199.6 211.5 222.2 231.6 239.8 246.7 252.4 256.9 260.1
4.0 106.4 127.4 147.1 165.6 182.9 198.9 213.7 227.2 239.5 250.6 260.4 269.0 276.3 282.4 287.3 290.9
5.0 130.0 151.4 171.5 190.4 208.1 224.5 239.7 253.6 266.3 277.8 288.0 297.0 304.7 311.2 316.5 320.5
6.0 152.4 174.2 194.7 214.0 232.1 248.9 264.5 278.8 291.9 303.8 314.4 323.8 331.9 338.8 344.5 348.9
7.0 173.6 195.8 216.7 236.4 254.9 272.1 288.1 302.8 316.3 328.6 339.6 349.4 357.9 365.2 371.3 376.1
8.0 193.6 216.2 237.5 257.6 276.5 294.1 310.5 325.6 339.5 352.2 363.6 373.8 382.7 390.4 396.9 402.1
9.0 212.4 235.4 257.1 277.6 296.9 314.9 331.7 347.2 361.5 374.6 386.4 397.0 406.3 414.4 421.3 426.9
10.0 230.0 253.4 275.5 296.4 316.1 334.5 351.7 367.6 382.3 395.8 408.0 419.0 428.7 437.2 444.5 450.5
11.0 246.4 270.2 292.7 314.0 334.1 352.9 370.5 386.8 401.9 415.8 428.4 439.8 449.9 458.8 466.5 472.9
12.0 261.6 285.8 308.7 330.4 350.9 370.1 388.1 404.8 420.3 434.6 447.6 459.4 469.9 479.2 487.3 494.1
13.0 275.6 300.2 323.5 345.6 366.5 386.1 404.5 421.6 437.5 452.2 465.6 477.8 488.7 498.4 506.9 514.1
14.0 288.4 313.4 337.1 359.6 380.9 400.9 419.7 437.2 453.5 468.6 482.4 495.0 506.3 516.4 525.3 532.9
15.0 300.0 325.4 349.5 372.4 394.1 414.5 433.7 451.6 468.3 483.8 498.0 511.0 522.7 533.2 542.5 550.5
16.0 310.4 336.2 360.7 384.0 406.1 426.9 446.5 464.8 481.9 497.8 512.4 525.8 537.9 548.8 558.5 566.9
17.0 319.6 345.8 370.7 394.4 416.9 438.1 458.1 476.8 494.3 510.6 525.6 539.4 551.9 563.2 573.3 582.1
18.0 327.6 354.2 379.5 403.6 426.5 448.1 468.5 487.6 505.5 522.2 537.6 551.8 564.7 576.4 586.9 596.1
19.0 334.4 361.4 387.1 411.6 434.9 456.9 477.7 497.2 515.5 532.6 548.4 563.0 576.3 588.4 599.3 608.9
20.0 340.0 367.4 393.5 418.4 442.1 464.5 485.7 505.6 524.3 541.8 558.0 573.0 586.7 599.2 610.5 620.5
21.0 344.4 372.2 398.7 424.0 448.1 470.9 492.5 512.8 531.9 549.8 566.4 581.8 595.9 608.8 620.5 630.9
22.0 347.6 375.8 402.7 428.4 452.9 476.1 498.1 518.8 538.3 556.6 573.6 589.4 603.9 617.2 629.3 640.1
23.0 349.6 378.2 405.5 431.6 456.5 480.1 502.5 523.6 543.5 562.2 579.6 595.8 610.7 624.4 636.9 648.1
24.0 350.4 379.4 407.1 433.6 458.9 482.9 505.7 527.2 547.5 566.6 584.4 601.0 616.3 630.4 643.3 654.9
25.0 350.0 379.4 407.5 434.4 460.1 484.5 507.7 529.6 550.3 569.8 588.0 605.0 620.7 635.2 648.5 660.5
26.0 348.4 378.2 406.7 434.0 460.1 484.9 508.5 530.8 551.9 571.8 590.4 607.8 623.9 638.8 652.5 664.9
27.0 345.6 375.8 404.7 432.4 458.9 484.1 508.1 530.8 552.3 572.6 591.6 609.4 625.9 641.2 655.3 668.1
28.0 341.6 372.2 401.5 429.6 456.5 482.1 506.5 529.6 551.5 572.2 591.6 609.8 626.7 642.4 656.9 670.1
29.0 336.4 367.4 397.1 425.6 452.9 478.9 503.7 527.2 549.5 570.6 590.4 609.0 626.3 642.4 657.3 670.9
30.0 330.0 361.4 391.5 420.4 448.1 474.5 499.7 523.6 546.3 567.8 588.0 607.0 624.7 641.2 656.5 670.5
31.0 322.4 354.2 384.7 414.0 442.1 468.9 494.5 518.8 541.9 563.8 584.4 603.8 621.9 638.8 654.5 668.9
32.0 313.6 345.8 376.7 406.4 434.9 462.1 488.1 512.8 536.3 558.6 579.6 599.4 617.9 635.2 651.3 666.1
33.0 303.6 336.2 367.5 397.6 426.5 454.1 480.5 505.6 529.5 552.2 573.6 593.8 612.7 630.4 646.9 662.1
34.0 292.4 325.4 357.1 387.6 416.9 444.9 471.7 497.2 521.5 544.6 566.4 587.0 606.3 624.4 641.3 656.9
35.0 280.0 313.4 345.5 376.4 406.1 434.5 461.7 487.6 512.3 535.8 558.0 579.0 598.7 617.2 634.5 650.5
36.0 266.4 300.2 332.7 364.0 394.1 422.9 450.5 476.8 501.9 525.8 548.4 569.8 589.9 608.8 626.5 642.9
37.0 251.6 285.8 318.7 350.4 380.9 410.1 438.1 464.8 490.3 514.6 537.6 559.4 579.9 599.2 617.3 634.1
38.0 235.6 270.2 303.5 335.6 366.5 396.1 424.5 451.6 477.5 502.2 525.6 547.8 568.7 588.4 606.9 624.1
39.0 218.4 253.4 287.1 319.6 350.9 380.9 409.7 437.2 463.5 488.6 512.4 535.0 556.3 576.4 595.3 612.9
40.0 200.0 235.4 269.5 302.4 334.1 364.5 393.7 421.6 448.3 473.8 498.0 521.0 542.7 563.2 582.5 600.5
41.0 180.4 216.2 250.7 284.0 316.1 346.9 376.5 404.8 431.9 457.8 482.4 505.8 527.9 548.8 568.5 586.9
42.0 159.6 195.8 230.7 264.4 296.9 328.1 358.1 386.8 414.3 440.6 465.6 489.4 511.9 533.2 553.3 572.1
43.0 137.6 174.2 209.5 243.6 276.5 308.1 338.5 367.6 395.5 422.2 447.6 471.8 494.7 516.4 536.9 556.1
44.0 114.4 151.4 187.1 221.6 254.9 286.9 317.7 347.2 375.5 402.6 428.4 453.0 476.3 498.4 519.3 538.9
45.0 90.0 127.4 163.5 198.4 232.1 264.5 295.7 325.6 354.3 381.8 408.0 433.0 456.7 479.2 500.5 520.5
46.0 64.4 102.2 138.7 174.0 208.1 240.9 272.5 302.8 331.9 359.8 386.4 411.8 435.9 458.8 480.5 500.9
47.0 37.6 75.8 112.7 148.4 182.9 216.1 248.1 278.8 308.3 336.6 363.6 389.4 413.9 437.2 459.3 480.1
48.0 9.6 48.2 85.5 121.6 156.5 190.1 222.5 253.6 283.5 312.2 339.6 365.8 390.7 414.4 436.9 458.1
49.0 -19.6 19.4 57.1 93.6 128.9 162.9 195.7 227.2 257.5 286.6 314.4 341.0 366.3 390.4 413.3 434.9
50.0 -50.0 -10.6 27.5 64.4 100.1 134.5 167.7 199.6 230.3 259.8 288.0 315.0 340.7 365.2 388.5 410.5
0.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0
0.0 161.3 160.8 159.1 156.2 152.0 146.6 139.9 132.0 122.9 112.5 100.9 88.0 73.9 58.6 42.0
1.0 196.1 196.0 194.7 192.2 188.4 183.4 177.1 169.6 160.9 150.9 139.7 127.2 113.5 98.6 82.4
2.0 229.7 230.0 229.1 227.0 223.6 219.0 213.1 206.0 197.7 188.1 177.3 165.2 151.9 137.4 121.6
3.0 262.1 262.8 262.3 260.6 257.6 253.4 247.9 241.2 233.3 224.1 213.7 202.0 189.1 175.0 159.6
4.0 293.3 294.4 294.3 293.0 290.4 286.6 281.5 275.2 267.7 258.9 248.9 237.6 225.1 211.4 196.4
5.0 323.3 324.8 325.1 324.2 322.0 318.6 313.9 308.0 300.9 292.5 282.9 272.0 259.9 246.6 232.0
6.0 352.1 354.0 354.7 354.2 352.4 349.4 345.1 339.6 332.9 324.9 315.7 305.2 293.5 280.6 266.4
7.0 379.7 382.0 383.1 383.0 381.6 379.0 375.1 370.0 363.7 356.1 347.3 337.2 325.9 313.4 299.6
8.0 406.1 408.8 410.3 410.6 409.6 407.4 403.9 399.2 393.3 386.1 377.7 368.0 357.1 345.0 331.6
9.0 431.3 434.4 436.3 437.0 436.4 434.6 431.5 427.2 421.7 414.9 406.9 397.6 387.1 375.4 362.4
10.0 455.3 458.8 461.1 462.2 462.0 460.6 457.9 454.0 448.9 442.5 434.9 426.0 415.9 404.6 392.0
11.0 478.1 482.0 484.7 486.2 486.4 485.4 483.1 479.6 474.9 468.9 461.7 453.2 443.5 432.6 420.4
12.0 499.7 504.0 507.1 509.0 509.6 509.0 507.1 504.0 499.7 494.1 487.3 479.2 469.9 459.4 447.6
13.0 520.1 524.8 528.3 530.6 531.6 531.4 529.9 527.2 523.3 518.1 511.7 504.0 495.1 485.0 473.6
14.0 539.3 544.4 548.3 551.0 552.4 552.6 551.5 549.2 545.7 540.9 534.9 527.6 519.1 509.4 498.4
15.0 557.3 562.8 567.1 570.2 572.0 572.6 571.9 570.0 566.9 562.5 556.9 550.0 541.9 532.6 522.0
16.0 574.1 580.0 584.7 588.2 590.4 591.4 591.1 589.6 586.9 582.9 577.7 571.2 563.5 554.6 544.4
17.0 589.7 596.0 601.1 605.0 607.6 609.0 609.1 608.0 605.7 602.1 597.3 591.2 583.9 575.4 565.6
18.0 604.1 610.8 616.3 620.6 623.6 625.4 625.9 625.2 623.3 620.1 615.7 610.0 603.1 595.0 585.6
19.0 617.3 624.4 630.3 635.0 638.4 640.6 641.5 641.2 639.7 636.9 632.9 627.6 621.1 613.4 604.4
20.0 629.3 636.8 643.1 648.2 652.0 654.6 655.9 656.0 654.9 652.5 648.9 644.0 637.9 630.6 622.0
21.0 640.1 648.0 654.7 660.2 664.4 667.4 669.1 669.6 668.9 666.9 663.7 659.2 653.5 646.6 638.4
22.0 649.7 658.0 665.1 671.0 675.6 679.0 681.1 682.0 681.7 680.1 677.3 673.2 667.9 661.4 653.6
23.0 658.1 666.8 674.3 680.6 685.6 689.4 691.9 693.2 693.3 692.1 689.7 686.0 681.1 675.0 667.6
24.0 665.3 674.4 682.3 689.0 694.4 698.6 701.5 703.2 703.7 702.9 700.9 697.6 693.1 687.4 680.4
25.0 671.3 680.8 689.1 696.2 702.0 706.6 709.9 712.0 712.9 712.5 710.9 708.0 703.9 698.6 692.0
26.0 676.1 686.0 694.7 702.2 708.4 713.4 717.1 719.6 720.9 720.9 719.7 717.2 713.5 708.6 702.4
27.0 679.7 690.0 699.1 707.0 713.6 719.0 723.1 726.0 727.7 728.1 727.3 725.2 721.9 717.4 711.6
28.0 682.1 692.8 702.3 710.6 717.6 723.4 727.9 731.2 733.3 734.1 733.7 732.0 729.1 725.0 719.6
29.0 683.3 694.4 704.3 713.0 720.4 726.6 731.5 735.2 737.7 738.9 738.9 737.6 735.1 731.4 726.4
30.0 683.3 694.8 705.1 714.2 722.0 728.6 733.9 738.0 740.9 742.5 742.9 742.0 739.9 736.6 732.0
31.0 682.1 694.0 704.7 714.2 722.4 729.4 735.1 739.6 742.9 744.9 745.7 745.2 743.5 740.6 736.4
32.0 679.7 692.0 703.1 713.0 721.6 729.0 735.1 740.0 743.7 746.1 747.3 747.2 745.9 743.4 739.6
33.0 676.1 688.8 700.3 710.6 719.6 727.4 733.9 739.2 743.3 746.1 747.7 748.0 747.1 745.0 741.6
34.0 671.3 684.4 696.3 707.0 716.4 724.6 731.5 737.2 741.7 744.9 746.9 747.6 747.1 745.4 742.4
35.0 665.3 678.8 691.1 702.2 712.0 720.6 727.9 734.0 738.9 742.5 744.9 746.0 745.9 744.6 742.0
36.0 658.1 672.0 684.7 696.2 706.4 715.4 723.1 729.6 734.9 738.9 741.7 743.2 743.5 742.6 740.4
37.0 649.7 664.0 677.1 689.0 699.6 709.0 717.1 724.0 729.7 734.1 737.3 739.2 739.9 739.4 737.6
38.0 640.1 654.8 668.3 680.6 691.6 701.4 709.9 717.2 723.3 728.1 731.7 734.0 735.1 735.0 733.6
39.0 629.3 644.4 658.3 671.0 682.4 692.6 701.5 709.2 715.7 720.9 724.9 727.6 729.1 729.4 728.4
40.0 617.3 632.8 647.1 660.2 672.0 682.6 691.9 700.0 706.9 712.5 716.9 720.0 721.9 722.6 722.0
41.0 604.1 620.0 634.7 648.2 660.4 671.4 681.1 689.6 696.9 702.9 707.7 711.2 713.5 714.6 714.4
42.0 589.7 606.0 621.1 635.0 647.6 659.0 669.1 678.0 685.7 692.1 697.3 701.2 703.9 705.4 705.6
43.0 574.1 590.8 606.3 620.6 633.6 645.4 655.9 665.2 673.3 680.1 685.7 690.0 693.1 695.0 695.6
44.0 557.3 574.4 590.3 605.0 618.4 630.6 641.5 651.2 659.7 666.9 672.9 677.6 681.1 683.4 684.4
45.0 539.3 556.8 573.1 588.2 602.0 614.6 625.9 636.0 644.9 652.5 658.9 664.0 667.9 670.6 672.0
46.0 520.1 538.0 554.7 570.2 584.4 597.4 609.1 619.6 628.9 636.9 643.7 649.2 653.5 656.6 658.4
47.0 499.7 518.0 535.1 551.0 565.6 579.0 591.1 602.0 611.7 620.1 627.3 633.2 637.9 641.4 643.6
48.0 478.1 496.8 514.3 530.6 545.6 559.4 571.9 583.2 593.3 602.1 609.7 616.0 621.1 625.0 627.6
49.0 455.3 474.4 492.3 509.0 524.4 538.6 551.5 563.2 573.7 582.9 590.9 597.6 603.1 607.4 610.4
50.0 431.3 450.8 469.1 486.2 502.0 516.6 529.9 542.0 552.9 562.5 570.9 578.0 583.9 588.6 592.0

As we can see that the optimal prices for each product in order to maximize the total revenue are PA = 27$ , PB= 33 $

c) using Solver ,the solution is -

Na Number of model A sold 13
Nb Number of model B sold 12
Pa Price of model A 27
Pb Price of model B 33
Total Revenue 748.0572

screenshot of solver is as follows-

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