Question: Mandy bought 3 packs of black shirts and 3 packs of yellow shirts for her tennis team. The black shirts come in packs of 5, and the yellow shirts come in packs of 2. How many shirts did Mandy buy in all?
Answer: The number of black shirts is 3 × 5 = 15. The number of yellow shirts is 3 × 2 = 6. Mandy bought 15 + 6 = 21 shirts. The answer is 21.

Question: A restaurant buffet has 36 different dishes available to try. The restaurant features mango salsa on three of its dishes, fresh mangoes in a sixth of its dishes, and mango jelly in one dish. Oliver despises mangoes and won't eat them, but can pick them out of two of the dishes with fresh mango that he would be willing to try. How many dishes are left for Oliver on the buffet?
Answer: There are fresh mangos in 36 / 6 = 6 dishes. Thus, there are 3 + 6 + 1 = 10 dishes with mango on the buffet. Oliver can pick the mango out of 2 of the dishes, so there are 10 - 2 = 8 dishes he won't eat. Thus, there are 36 - 8 = 28 dishes left for Oliver on the buffet. The answer is 28.

Question: A school bus has 4 columns and 10 rows of seats. If the school has 6 buses, how many students can the buses accommodate?
Answer: Each bus can accommodate 10 x 4 = 40 students. Therefore, 40 x 6 = 240 students can be accommodated by the six busses. The answer is 240.

Question: In a compound, the number of cats is 20% less than the number of dogs. There are also twice as many frogs as the number of dogs in the compound. Calculate the total number of animals present in the compound if there are 160 frogs.
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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There are twice as many frogs as dogs in the compound, meaning there are 160 / 2 = 80 dogs. The total number of frogs and dogs in the compound is 80 + 160 = 240. The number of cats is less than 20% of the number of dogs, which means there are 20 / 100 * 80 = 16 dogs more than the number of cats. Therefore, the number of cats is 80 - 16 = 64 cats. The total number of animals in the compound is 64 cats + 240 dogs and frogs = 304 animals. The answer is 304.