The following information is for Carthage Manufacturing Company's first year of operations: Revenues Manufacturing costs Variable Fixed Operating costs Variable Fixed $1,400,000 $272,000 $630,000 $140,000 $198,000 68,000 60,000 None Units manufactured Units sold Work in process, ending inventory To better focus on concepts, this exercise assumes actual costs are equal to budgeted costs. Assume the company uses variable costing: a. Compute the cost of ending finished goods inventory. b. Compute operating income. Assume the company uses absorption costing and the denominator level is 70,000 units per year: c. Compute the cost of ending finished goods inventory. d. Compute the production-volume variance. e. Compute operating income.