Variable Costing-Sales Exceed Production The beginning inventory is 7,800 units. All of the units that were manufactured during the period and 7,800 units of the beginning inventory were sold. The beginning Inventory fixed manufacturing costs are $56 per unit, and variable manufacturing costs are $103 per unit. a. Determine whether variable costing operating income is less than or greater than absorption costing operating income. b. Determine the difference in variable costing and absorption costing operating income