J&J Manufacturing Company sells its products for $33 each. The current production level is 50,000 units, although only 40,000 units are anticipated to be sold.

Unit manufacturing costs are:

Direct materials $6.00

Direct manufacturing labour $9.00

Variable manufacturing overhead $4.50

Total fixed manufacturing overhead $180,000

Marketing expenses $3.00 per unit, plus $100,000 per year

(a) Compute the cost of the ending inventory under absorption costing.

(b) Compute the Contribution Margin and Net Profit under variable costing.

(c) Compute the Throughput Margin and the Net Profit under throughput costing.