Gourmet Restaurants has the following flexible-budget formula: Y = $13PH + $450,000 where PH is defined as process hours. Which of the following statements is (are) true? Select one: O a. Gourmet has $450,000 of fixed costs. O b. Each additional hour of process time is expected to cost Gourmet $13. O c. Y would equal the amount shown as "total cost" in the company's flexible budget. O d. Both Gourmet has $450,000 of fixed costs and each additional hour of process time is expected to cost Gourmet $13. O e. All of the other answers are correct