Variable Costing-Sales Exceed Production The beginning inventory is 12,400 units. All of the units that were manufactured during the period and 12,400 units of the beginning inventory were sold. The beginning inventory fixed manufacturing costs are $55 per unit, and variable manufacturing costs are $109 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