Quality improvement, relevant costs, relevant revenues. SpeedPrint manufactures and sells 18,000 high-technology printing presses each year. The variable and fixed costs of rework and repair are as follows: Variable Cost Fixed Cost Total Cost

Rework Cost per hr. $79 $115 $194
Repair Cost
Customer Support cost/hr. 35 55 90
Transportation Cost/load 350 115 465
Warranty repair cost/hour 89 150 239

SpeedPrint current presses have a quality problem that causes variations in the shade of some colors. Its engineers suggest changing a key component in each press. The new component will cost $70 more than the old one. In the next year, however, SpeedPrint expects that with the new component it will (1) save 14,000 hours of rework, (2) save 850 hours of customer support, (3) move 225 fewer loads, (4) save 8,000 hours of warranty repairs, and (5) sell an additional 140 printing presses, for a total contribution margin of $1,680,000. SpeedPrint believes that even as it improves quality, it will not be able to save any of the fixed costs of rework or repair. SpeedPrint uses a 1-year time horizon for this decision because it plans to introduce a new press at the end of the year.

Required:
a. Should SpeedPrint change to the new component?
b. Suppose the estimate of 140 additional printing presses sold is uncertain. What is the minimum number of additional printing presses that SpeedPrint needs to sell to justify adopting the new component?
c. What other factors should managers at SpeedPrint consider when making their decision about changing to a new component?