Rathburn, Inc is a seevice firm that uses process costing. The firm worked on a total of 1,000 cases this momth, 800 of which were completed during the period. The remaining cases were 40% complete. The firm incurred $180,000 in direct lavor and manufacturing over head. costs during the period and had $4,800 in direct labor and manufacturing costs in beginning inventory. Using the weighted average method? what was the total cost of cases still in process at the end of the period?

A. $16,800

B. $175,200

C. $17,520

D. $168,000