Answer A:
Let x be the number of tacos that are made and sold in a day.
Sale price of each taco =$5.75
Hence:
R(x) = $5.75 * x = 5.75x
R(x) = 5.75x
Answer B:
Variable cost per taco = $2.10
Total variable cost for making x tacos = $2.10 * x
Fixed cost per day = $180
Total cost for making x tacos = $180 + $2.10 * x
Hence:
C(x) =180 +2.10x
Answer C:
Profit = Total Contribution - Fixed cost = ($5.75 - $2.10) * x - $180
=3.65x - 180
Hence:
P(x) = 3.65x -180
Answer D:
Break-even in units = Fixed cost / Contribution per unit = 180 / (5.75 - 2.10) = 49.31 = 49
Break-even in units = 49
Answer E:
As all tacos that are made are sold and assuming all cash transactions:
690 = 3.65x -180
=> x = (690 +180) / 3.65 = 238.36 tacos
Total cost = 238.36 * 2.10 + 180 = $681
Hence:
Profit = $690
Cost = $681
At Carla's taco stand, each taco costs $2.10 to make and she sells each one for...
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