Total cost function is C(x) = 35x + 2500
Total revenue function is R(x) = 60x
a)
Recall,
total profit = total revenue - total cost
Total profit function would be
P(x) = R(x) - C(x)
P(x) = 60x - (35x + 2500)
P(x) = 60x - 35x - 2500
P(x) = 25x - 2500
b) The break even point is the point where revenue - cost = 0
Revenue = cost
60x = 35x + 2500
60x - 35x = 2500
25x = 2500
x = 2500/25
x = 100
The break even occurs when x = 100