Please help! Worth 30 points.

3. One of the offices at the company was being repainted. Riley’s mother challenged him to figure out how many quarts of paint would be needed. The office is 16 ft long and 12 ft wide, and the height of each wall is 10 ft. The office floor, ceiling, and door are not being painted, and there are no windows in this office. The door opening measures 3 ft by 8 ft. One quart of paint covers 100 ft^2. How many quarts of paint are needed to paint the room, if only full quarts can be purchased? Show your work.