Question: Jason waits on a customer whose check comes to $15.00. Jason's state applies a 20% tax to restaurant sales. If the customer gives Jason a $20 bill and tells him to keep the change, how much is Jason's tip?
Answer: First calculate how much the tax is by multiplying $15.00 by 20%: $15.00 * .2 = $3.00. Then subtract the cost of the meal and the tax from $20 to find Jason's tip: $20 - $15.00 - $3.00 = $2.00. The answer is 2.
[Question]Kyle makes $3200.00 every month. His monthly bills include $1250 for rent, $150 on utilities, $400 into retirement & savings accounts, $300.00 on groceries/eating out, $200 for insurance and $200 for miscellaneous expenses. If he’s looking at buying a car with a monthly car payment of $350 how much does that leave for gas and maintenance?
[Answer]Kyle’s monthly bills are 1250 + 150 + 400 + 300 + 200 + 200 = $2,500.00. He makes $3200 and his bills are $2500 so that leaves 3200 - 2500 = $700.00. If he buys a car with a monthly car payment of $350 then that leaves 700 - 350 = $350.00 left over for gas and maintenance. The answer is 350.
Q: Nick hides 10 chocolates in his closet. His brother Alix hides 3 times as many chocolates than Nick hides. Last night, their mom found and took 5 chocolates from Alix. How many more chocolates does Alix have than Nick?
A: Alix has 3 * 10 = 30 chocolates. After his mom took 5 chocolates, Alix has now 30 - 5 = 25 chocolate. So Alix has 25 - 10 = 15 chocolates more than Nick. The answer is 15.
Question: Out of the 400 emails that Antonia received in her mail, 1/4 were spam emails, while 2/5 of the remaining emails were promotional messages. If the rest of the emails were important emails, calculate the total number of important emails in her inbox.
Answer: Out of the 400 emails, 1 / 4 * 400 = 100 emails were spam emails. The number of emails that were not spam emails is 400 - 100 = 300. 2 / 5 of the emails which were not spam were promotional emails, a total of 2 / 5 * 300 = 120 emails. If the rest of the emails were important emails, there were 300 - 120 = 180 important emails. The answer is 180.
[Question]Grace's age is 3/8th the age of her grandmother. Her grandmother is twice the age of Grace's mother. If Grace's mother is 80 years old, how old is Grace?
[Answer]Grace's grandmother is 2 * 80 years = 160 years old. Grace's age is 3 / 8 * 160 years = 60 years old. The answer is 60.
[Question]Chelsea made 4 batches of cupcakes for the bake sale. The cupcakes took 20 minutes to bake and 30 minutes to ice per batch. How long did it take Chelsea to make the cupcakes?
[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.
user
Chelsea baked 4 batches of cupcakes x 20 minutes each = 80 minutes of baking. She iced 4 batches of cupcakes x 30 minutes each = 120 minutes. It took Chelsea 80 + 120 = 200 minutes to make the cupcakes for the bake sale. The answer is 200.