please assist

a. Blue Dot Beer's production cost, in dollars, per week of producing x bottles is given by C(x) = 6700 - 96x + 0.05x2 + 0.00002x3. In addition, Blue Dot Beer's demand function for the bottles is given by: p(x) = 550 + 0.01x. Write an expression in x to determine: 1 . the marginal cost function 11. the marginal revenue function b. The cost of producing soup cups is shown below: C(x) = - 0.00025x2+ 1500x + 14,000 Find the total cost of producing: a) 80,000 soup cups. b) 45,000 soup cups