Question 9 0 / 1 pts A firm has fixed costs of $4,000. Its short-run production function is y = 4VE, where y is the quantity of output and & is the quantity of input. The price of the input is $4,000 per unit. The firm's short-run cost function is 4000 + 4000y O 4000 + 0.25y O 4000/y + 4000 O 4000 + 250y 0 8000y