The McGraw Company is accumulating data to be used in preparing its annual profit plan for the coming year. The cost behavior pattern of the maintenance costs must be determined. The accounting staff has suggested that linear regression be employed to derive an equation in the form of y = a + bx for maintenance costs. Data regarding the maintenance hours and costs for last year and the results of the regression analysis are as follows: (CMA adapted)
Hours of Activity | Maintenance Costs | |||||||
January | 480 | $ | 4,200 | |||||
February | 320 | 3,000 | ||||||
March | 400 | 3,600 | ||||||
April | 300 | 2,820 | ||||||
May | 500 | 4,350 | ||||||
June | 310 | 2,960 | ||||||
July | 320 | 3,030 | ||||||
August | 520 | 4,470 | ||||||
September | 490 | 4,260 | ||||||
October | 470 | 4,050 | ||||||
November | 350 | 3,300 | ||||||
December | 340 | 3,160 | ||||||
Sum | 4,800 | $ | 43,200 | |||||
Average | 400 | 3,600 | ||||||
A coefficient | 684.65 | |||||||
B coefficient | 7.2884 | |||||||
Standard error of the a coefficient | 49.515 | |||||||
Standard error of the b coefficient | 0.12126 | |||||||
Standard error of the estimate | 34.469 | |||||||
R2 | 0.99724 | |||||||
T-value a | 13.827 | |||||||
T-value b | 60.105 | |||||||
Using the high-low method to estimate cost behavior, 420
maintenance hours in a month would mean the maintenance costs would
be budgeted at:
$3,600.
$3,150.
$3,780.
$3,720.
Variable cost per unit = (Highest activity cost - Lowest activity cost)/(Highest activity - Lowest activity)
= (4,470-2,820)/(520-300)
= 1,650/220
= 7.5 per hour
Fixed cost = Highest activity cost - Highest activity x Variable cost per hour
= 4,470 - 520 x 7.5
= 4,470 - 3,900
= $570
estimate cost behavior, 420 maintenance hours in a month would mean the maintenance costs would be budgeted at=
= Fixed cost + Variable cost per hour x Activity hour
= 570 + 7.5 x 420
= 570+3,150
= $3,720
Fourth option is correct option.
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The McGraw Company is accumulating data to be used in preparing its annual profit plan for the coming year. The cost behavior pattern of the maintenance costs must be determined. The accounting staff has suggested that linear regression be employed to derive an equation in the form of y = a + bx for maintenance costs. Data regarding the maintenance hours and costs for last year and the results of the regression analysis are as follows: (CMA adapted) Hours of...
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