Cost, revenue, and profit are in dollars and x is the number of units. If the marginal cost for a product is MC = 2x + 3 and the production of 10 units results in a total cost of $450, find the total cost function. C(x) = x^2 + 3x + 260. Cost, revenue, and profit are in dollars and x is the number of units. If the marginal cost for a product is MC = 160 + 0.15∑x and the total cost of producing 100 units is $45,000, find the total cost function. C(x) = 160x + 0.1x^(3/2) + 26900. Find the fixed costs (in dollars). $ 26900