Chapter 9, Problem 9.13SE

A company had an income of $60,000 using absorption costing for a given period. Beginning and ending inventories for that period were 13,000 units and 18,000 units, respectively. Ignoring income taxes, if the fixed overhead application rate was $3.00 per unit, what was the income using variable costing? A. $75,000. B. $60,000. C. $45,000. D. Not sufficient information to determine.

Please explain the correct approach for solving this general accounting question.

what does the total monthly fixed overhead cost ?