VI. [15 points] The marginal cost function for a company is given by C'(q) = (12 8g + 40 dollars/ unit, Where q is the quantity produced. If 0(0) 2 $500, then (a) What is the xed cost? (b) Use a calculator to compute the total variable cost of producing 30 units. (0) What is the total cost of producing 30 units