If f(x) represents the marginal cost at x items and the fixed costs are C, which of the following is not true? Flag question Select one: O a. f(5) = 7 tells you that the cost to produce the 6th item will be $7. 100 O b. Sot" f(x)dx + C will tell you the total cost to produce 100 items. O c. 100 Solº f(x)dx – 5.5° f(x)dx will tell you the additional cost to produce items 50 through 100. O d. f(3) = 35 tells you cost to produce 3 items will be $35. O e. C will tell you the variable cost to produce 50 items.