Answer:
22 gallons of paint
Explanation:
Keep in mind, there are approximately 4 quarts in a gallon.
To find how many quarts are only to be used inside, you can find the difference of 107 and 19.
Result should be 88 quarts.
Then divide that by 4 and you'll end up with 22 gallons.
107-19=88
88/4=22