PROBLEM 8-12 Variable and Absorption Costing Unit Product Costs and Income Statements; Coverall Inc. produces and sells a unique type of case for a standard-size tablet computer that is guaran- teed waterproof but still allows for regular functionality of the tablet. The company has just opened a Explanation of Difference in Operating Income [LO1, LO2, LO3] thew plant to manufacture these cases, and the following cost and revenue data have been provided for the first month of the plant's operation in the form of a worksheet: Beginning inventory. Units produced Units sold. Selling price per unit $ 0 20.000 15,000 $ 80 $ 6 $475,000 Selling and administrative expenses: Variable per unit. Fixed (total) Manufacturing costs: Direct materials cost per unit. Direct labour cost per unit. Variable manufacturing overhead cost per unit. Fixed manufacturing overhead cost (total). $ 12 $ 9 $ 5 $600,000 a. Since the new case is unique in design, management is anxious to see how profitable it will be and has asked that an income statement be prepared for the month. Required: 1. Assume that the company uses absorption costing. Determine the unit product cost. b. Prepare an income statement for the month. 2. Assume that the company uses variable costing. Determine the unit product cost. b. Prepare a contribution format income statement for the month. 3. Explain the reason for any difference in the ending inventory balances under the two costing meth- ods and the impact of this difference on reported operating income. a. Inn