A cake maker has determined that the cost of producing wedding cakes is $61.50 per wedding cake plus $16620 per month in fixed costs. The cake maker sells each wedding cake for $200. Step 2 of 4: Find the cost function. Answer C(x) = Keypad Keyboard Shortcuts Previous Step Answer The total cost of producing x instruction manuals is given by the function C(x) = 200 + 16x-0.7x + 0.1x. Find the marginal cost function. Answer C'(x) = Keypad Keyboard Shortcuts