A chain saw requires 2 hours of assembly and a wood chipper 5 hours. A maximum of 20 hours of assembly time is available. The profit is 150 on a chain saw and 230 on a chipper. How many of each should be assembled for maximum profit.

Answer 1

chain saw assembly profit per hr = $75 /h
chipper assembly profit per hr = $46 /h

Assemble only chain saws.
You will assemble 10 and earn $750.

I don't see how calculus is needed for this question.