20. Lock Production Co. applies factory overhead to production on the basis of direct labor costs. Assume that at the beginning of the current year the company estimated that direct material costs would be $178,800, direct labor costs would be $154,000, and factory overhead costs would be $231,000. (1) If the $28,000 cost of Lock's Work in Process inventory included $5,200 of direct labor cost, what amount of direct materials cost was included? (2) If $8,100 of the company's $34,300 finished goods inventory was direct materials cost, determine the direct labor cost and factory overhead cost of the finished goods inventory.

21. Prepare journal entries to record the following transactions and events for April using a job order costing system. (a) Purchased raw materials on credit, $69,000. (b) Raw materials requisitioned: $26,000 direct and $5,400 indirect. (c) Factory payroll totaled $46,000, including $9,500 indirect labor. (d) Paid other actual overhead costs totaling $14,500 cash. (e) Applied overhead totaling $28,200. (f) Finished and transferred jobs totaling $77,500. (g) Jobs costing $58,800 were sold on credit for $103,000.

22. A company's ending inventory of finished goods has a cost of $45,000 and consists of 750 units. If the overhead applicable to these goods is $8,400, and overhead is applied at the rate of 60% of direct labor, what is the cost of the direct materials used to produce these units?

23. The production of one unit of Product BJM used $27.50 of direct materials and $21.00 of direct labor. The unit sold for $76.00 and was assigned overhead at a rate of 30% of labor costs. What is the gross profit per unit on its sale?