Use the following to answer questions 18-21 GG Inc., begins the year with inventory of $50,000 and ends the year with inventory of $46,200. During the year, the following amounts are recorded: Sales Sales returns & allowances Sales discounts Purchases Operating expenses $850,000 2,000 17,000 580,000 210,000 18. $ _Net Sales 19. $. _Calculate cost of goods sold 20. $ Gross profit _% Gross profit ratio (rounded to once decimal place)