The Lee Company uses a job-order costing system. The following data were for June :

Job Number

235 , june 1 work in process inventory : $2,500 direct materials : $600 direct labor : $400

236, june 1 work in process inventory : $1,500 direct materials : $800 direct labor : $1,000

237, june 1 work in process inventory : $1,000 direct materials : $1,200 direct labor : $1,750

238, june 1 work in process inventory : $800 direct materials : $1,500 direct labor : $2,250

Question : Overhead is charged to production at 80% of direct materials cost. Jobs 235, 237, and 238 were completed during June and transferred to finished goods. Jobs 235 and 238 have been delivered to customers. Lee Company's cost of goods sold for June was :

A) $15,520 B) $10,170 C) $9,730 D) $14,460

ANSWER WAS C) BUT I NEED HELP WITH STEPS AS TO HOW, NOT JUST AN AGREEMENT WITH THE ANSWER OR AN ANSWER . THANKS :)