11) Pembroke Corporation uses a job-order costing system with a single plantwide predetermined overhead rate based on machine-hours. The company based its predetermined overhead rate for the current year on the following data (4 pts): Total machine-hours Total fixed manufacturing overhead cost Variable manufacturing overhead per machine-hour 70,000 $ 357,000 $ 3.90 The estimated total manufacturing overhead is closest to: A) $273,000 B) $630,000 C) $357,004 D) $357,000 12) Stauffer Corporation has provided the following contribution format income statement. Assume that the following information is within the relevant range (4 pts). Sales (8,000 units) Variable expenses Contribution margin Fixed expenses Net operating income 320,000 192,000 128,000 118,400 9,600 $ The variable expense ratio is closest to: 20) A) 33% B) 60% C) 67% D) 40%