Company X sells widgets. The following information summarizes the company's operating activities for the year: Beginning inventory Sales revenue Sales commissions Rent for office Utilities for the office Purchases Ending inventory $7,900 $25,600 $700 $2,700 $1,600 $6,000 $5,200 What is cost of goods sold? OA. $6,000 OB. $13,900 OC. $10,200 OD. $8,700