18-30. Absorption and Variable Costing Comparisons: Production Equals Sales Assume that Smuckers manufactures and sells 30,000 cases of peanut butter each quarter. The follow- ing data are available for the third quarter of 2017. 20,000 32 15 Fixed selling and administrative expenses........... .. . .. . .. . . . . .. . . . . . .. . . . . . . Direct materials per case . Direct labor per case Variable manufacturing overhead per case .. . . compute the cost per case under both absorption costing and variable costing. Reconcile any differences in income. Explain. b. Compute te net income under both absorption costing and variable costing