please show work so that I may study for an upcoming final. much appreciated.

4. Given the following data: Cost of materials used $45,000 Direct labor costs 48.000 Factory overhead 39,000 Work in process, beginning 28.000 Work in process, ending 18.000 Finished goods, beginning 28.000 Finished goods, ending 18.000 What is the cost of goods sold? a. $152,000 b. $142,000 c. $10,000 d. $128,000