Question: To upgrade her kitchen, Amanda is changing out the doorknobs/pulls. She’s replacing 18 cabinet knobs, which cost $2.50 each and 8 drawer pulls which cost $4.00. How much will the kitchen upgrade cost her?
Answer: She’s replacing 18 cabinet knobs for $2.50 each for a total of 18 * 2.50 = $45.00. She’s replacing 8 drawer pulls for $4.00 each for a total of 8 * 4 = $32.00. The cabinet knobs will cost $45.00 and the pulls will cost $32.00 for a total of 45 + 32 = $77.00 in upgrades. The answer is 77.

Question: Ben spends 20% of his after-tax income on his car. If his car payment is $400 and he pays 1/3 of his gross income in taxes, how much does he make per month before taxes?
Answer: First divide that amount of the car payment by 20% to find Ben's after - tax salary: $400 / .2 = $2000. Then find the proportion of his salary Ben keeps after taxes by subtracting the tax rate from 1: 1 - 1 / 3 = 2 / 3. Then divide Ben's after - tax salary by the proportion of his salary he keeps to find his before - tax salary: $2000 / 2 / 3 = $3000. The answer is 3000.

Question: A pastry chef is making brownies but is running out of butter. The recipe he is following calls for 2 ounces of butter for every 1 cup of baking mix; however, it allows 2 ounces of coconut oil to be substituted for the 2 ounces of butter if necessary. The chef would like to use as much butter as possible before switching over and substituting coconut oil. If the chef had 4 ounces of butter remaining, and he plans on using 6 cups of baking mix, how many ounces of coconut oil will he end up using?
Answer: Every 2 ounces of butter is enough to cover 1 cup of baking mix, so the chef's remaining 4 ounces of butter will be enough to cover 4 / 2 = 2 cups of baking mix. This leaves 6 - 2 = 4 cups of baking mix that will require the use of coconut oil as a substitute. Since each cup of baking mix requires 2 ounces of coconut oil, these 4 cups will require a total of 4 * 2 = 8 ounces of coconut oil. The answer is 8.

Question: Davante has twice as many friends as there are days in the week. 3 of his friends are girls. How many friends does he have that are boys?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Davante has 14 friends because 2 times 7 equals 14. Davante has 11 friends who are boys because 14 - 3 equals 11. The answer is 11.