Question: A guy goes to the tool shop and buys 5 sets of drill bits. Each set cost 6 dollars. He then pays 10% tax on the order. What was the total amount he paid?
Answer: The drill bits cost 5 * 6 = $30. The tax came out to 30 * .1 = $3. So the total cost was 30 + 3 = $33. The answer is 33.
[Question]Michael is baking a cake and needs 6 cups of flour. The only measuring cup he has is the 1/4 cup. He has an 8 cup bag of flour and realizes it would be faster to measure the flour he doesn't need, take it out of the bag, and then dump the rest of the bag into the bowl. How many scoops should he remove?
[Answer]He needs to remove 2 cups of flour because 8 minus 6 equals 2. He needs to use 8 scoops because 2 divided by .25 equals 8. The answer is 8.
Q: If there were 200 students who passed an English course three years ago, and each subsequent year until the current one that number increased by 50% of the previous year's number, how many students will pass the course this year?
A: We begin 3 years ago with 200 students, and moving forward to two years ago we find there were 200 * 1.5 = 300 students who passed. At the end of the subsequent year 50% more students pass than last year's 300, so that means 300 * 1.5 = 450 students pass. At the end of the current year there's another 50% increase over the previous year, meaning we have 450 * 1.5 = 675 students pass. The answer is 675.
Question: Lyka wants to buy a smartphone worth $160 but she only has $40 at the moment. She plans to save an equal amount of money per week for two months for the remaining amount that she needs. How much should she save per week?
Answer: Lyka has to save a total of $160 - $40 = $120 for two months. There are 2 x 4 = 8 weeks in two months. Hence, Lyka needs to save $120 / 8 = $15 per week. The answer is 15.
[Question]Mary brought 50 stickers to class. She gave 4 stickers to each of her 5 friends. She gave everyone else in class two stickers each. If she has 8 stickers left over, how many students are in the class, including Mary?
[Answer]She gave out 50 - 8 = 42 stickers in total. She gave 4 * 5 = 20 stickers to her friends. She gave out 42 - 20 = 22 stickers to the rest of the class. This means there are 22 / 2 = 11 other students in the class. There are a total of 1 + 5 + 11 = 17 students in the class. The answer is 17.
[Question]Tina has 12 pink pens. She has 9 fewer green pens than pink pens. Tina has 3 more blue pens than green pens. How many pens does Tina have in total?
[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
Tina has 12 - 9 = 3 green pens. Tina has 3 + 3 = 6 blue pens. In total Tina has 12 + 3 + 6 = 21 pens. The answer is 21.