From the following data, calculate, and identify the gross profit. Sales: $20,000 Operating Expense: $2,000 Net Profit: $3,000 Cost of Goods Sold: $5,000 Cost of balance Inventory $10,000 a. $10,000 O b. O C. Q O d. O e. O f. $15,000 $8,000 $23,000 $13,000 $18,000 O g. $3,000 P11C