BE 21-4 Analyzing income under absorption and variable costing

Variable manufacturing costs are $126 per unit, and fixed manufacturing costs are $157,500. Sales are estimated to be 10,000 units. a. How much would absorption costing operating income differ between a plan to produce 10,000 units and a plan to produce 15,000 units? b. How much would variable costing operating income differ between the two production plans?