Use the following to answer questions $1821$

The company begins the year with inventory of $$50,000$ and ends the year with inventory of $$33,000.$ During the year,

the following amounts are recorded:

Sales $$900,000$

Sales returns & allowances $10,000$

Sales discounts $10,000$

Purchases $500,000$

Operating expenses $354,000$

$18.$ $$\_\_\_\_\_\_\_\_\_\_\_\_\_$Net Sales

$19.$ $$\_\_\_\_\_\_\_\_\_\_\_\_\_$Calculate cost of goods sold

$20.$ $$\_\_\_\_\_\_\_\_\_\_\_\_\_$ Gross profit

$21.\_\_\_\_\_\_.\_\_\%$ Gross profit ratio $($rounded to once decimal place$)$