Answer:
Crossover point: 1,000 pounds
at 500 pounds of production Machine A generates less cost for Kirstin
Explanation:
We need to solve for the quantity at which Kirstin is indiferent about which machine to purchase as both have the same cost:
Machine A: 1Q + 300
Machine B: 0.3Q + 1,000
1Q + 300 = 0.3Q + 1,000
(1-0.3)Q = 1,000 - 300
0.70Q = 700
q = 700/0.7 = 1,000
at 500 pounds;
Machine A: $ 1.00 (500) + $300 = $ 800
Machine B: $ 0.30 (500) + 1,000 = $ 1,150
Machien A is better.