The price-demand and cost functions for the production of microwaves are given as
[math]

(A) Find the marginal cost as a function of [math]

[math]

(B) Find the revenue function in terms of [math]

[math]

(C) Find the marginal revenue function in terms of [math]

[math]

(D) Evaluate the marginal revenue function at [math]

[math]

(E) Find the profit function in terms of [math]

[math]

(F) Evaluate the marginal profit function at [math]

[math]

Your overall score for this problem is