Gregory Incorporated produces a single product. Last year, the company had net operating income of $60,000 using variable costing. Beginning and ending inventories were 22,000 and 27,000 units, respectively. If the fixed manufacturing overhead cost was $6 per unit both last year and this year, what was the income using absorption costing? Select one: O a. $90,000.00 b. $30,000.00 oc. $30,000.00 d. $192,000.00