Variable Costing-Sales Exceed Production The beginning inventory is 20,500 units. All of the units that were manufactured during the period and 20,500 units of the beginning inventory were seld inventory fixed manufacturing costs are $39 per unit, and variable manufacturing costs are $89 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. $