The Dorset Corporation produces and sells a single product. The following data refer to the year just completed: Assume that direct labor is a variable cost. Required: a. Compute the unit product cost under both the absorption costing and variable costing approaches. b. Prepare an income statement for the year using absorption costing. c. Prepare an income statement for the year using vartable costing. d. Reconcile the absorption costing and variable costing net operating income figures in (b) and (c) above