Swifton Company produces a single product. Last year, the company had net operating income of $40,000 using variable costing. Beginning and ending inventories were 22,000 and 27,000 units, respectively. If the fixed manufacturing overhead cost was $3.00 per unit, what was the income using absorption costing?
a) $15,000
b) $25,000
c) $40,000
d) $55,000