Calculus
posted by Mel <3 .
Carla Music Company estimates that the marginal cost of manufacturing its professional series guitar is C’ (x) = .002x + 100 dollars/month when the level of production is x guitars/month. The fixed costs by Carla are $4000 per month.
A. Find the total monthly cost incurred by Carla in manufacturing x guitars per month.
B. What is the cost of producing 50 guitars per month.
I am soo confused on this problem and I have no idea how to even start. can someone please help me?!?

If you typed it correctly, your equation is the derivative of C, so integrate it
C = .001x^2 + 100x + 4000
B:
C = .001(2500) + 100(50) + 4000
=
=.....