Management of Mcgibboney Corporation has asked your help as an intern in preparing some key reports for November. The beginning balance in the raw materials inventory account was $25,000. During the month, the company made raw materials purchases amounting to $54,000. At the end of the month, the balance in the raw materials inventory account was $37,000. Direct labor cost was $25,000 and manufacturing overhead cost was $62,000. The beginning balance in the work in process account was $22,000 and the ending balance was $23,000. The beginning balance in the finished goods account was $44,000 and the ending balance was $50,000. Selling expense was $21,000 and administrative expense was $38,000. The conversion cost for November was: Select one: O a. $116,000 O b. $79,000 O c. $87,000 O d. $129,000