B.5 The Attaran Corporation manufactures two electrical products: portable air
conditioners and portable heaters. The assembly process for each is similar in that both
require a certain amount of wiring and drilling. Each air conditioner takes 3 hours of
wiring and 2 hours of drilling. Each heater must go through 2 hours of wiring and 1 hour
of drilling. During the next production period, 240 hours of wiring time are available and
up to 140 hours of drilling time may be used. Each air conditioner sold yields a profit of
$25. Each heater assembled may be sold for a $15 profit.
Formulate and solve this LP production-mix situation, and find the best combination of
air conditioners and heaters that yields the highest profit.