The cost function of a certain product is given by:
C(x) = 1500 + 60x +0.75x2
a) how much does it cost to produce 30 units of the product?
b) how much does it cost to produce 31 units of the product?
c) what is the exact cost of producing the 31st unit?
d) what is the marginal cost at a production level of 30 units?
e) interpret the results of parts c) and d)