I need help with 19-1

Why would the manager of a service company need to use job order costing? How is the predetermined overhead allocation rate used by service companies? Distinguishing between job order costing and process costing Would the following companies most likely use job order costing or process costing a. A manufacturer of refrigerators b. A manufacturer of specialty wakeboards c. A manufacturer of luxury yachts d. A professional services firm e. A landscape contractor f. A custom home builder g. A cell phone manufacturer h. A manufacturer of frozen pizzas i. A manufacturer of multivitamins j. A manufacturer of tennis shoes