Question: Bill is trying to control the pests in his garden. Each spider he introduces eats 7 bugs, and each time he sprays the garden he reduces the total bug population to 80% of what it was previously. If the garden has 400 bugs to start, and Bill sprays once and introduces 12 spiders, how many bugs are left?
Answer: First find the total bug population after spraying: 80% * 400 bugs = 320 bugs. Then find the total number of bugs each spider eats: 12 spiders * 7 bugs / spider = 84 bugs. Then subtract that number from the number of bugs left after spraying to find final number of bugs: 320 bugs - 84 bugs = 236 bugs. The answer is 236.

Question: Faith is getting paid $13.50 per hour. She normally works 8 hours a day, 5 days a week, plus 2 hours of overtime per day. How much will she earn by the end of the week?
Answer: Faith earns $13.50 x 8 = $108 per day. Since she works 5 days a week, she earns 5 x $108 = $540 per week. She gets an additional 2 x $13.50 = $27 per day for the overtime pay. She earns a total of $27 x 5 = $135 additional pay for her weekly overtime. Therefore, Faith earns $540 + $135 = $675 per week. The answer is 675.

Question: Joanna and Jacques had 40 and 60 gumballs, respectively, in their dishes. They then purchased 4 times the number of gumballs they had initially and added these to their dishes. If they decided to put together their gumballs and shared them equally, how many gumballs did each get?
Answer: When Joanna purchased 4 times the number of gumballs she initially had, she added 40 * 4 = 160 gumballs to her dish. The total number of gumballs Joanna had in her dish after buying 160 more is 160 + 40 = 200. At the same time, Jacques bought 60 * 4 = 240 new gumballs. When Jacques added his new 240 gumballs to his dish, the total number of gumballs increased to 240 + 60 = 300 gumballs. When they decided to put together their gumballs, they had 300 + 200 = 500 gumballs altogether. After sharing equally, each person got 500 / 2 = 250 gumballs. The answer is 250.

Question: Fred was having a party and was responsible for buying canned soda. He figured every guest would drink 2 sodas and he was inviting 15 people to the party. The local store had a deal on sodas that week. Every 6 pack of canned sodas was on sale for $3.00. How much would it cost Fred to buy enough sodas for every guest to have 2 cans?
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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He planned on 2 sodas per guest and invited 15 guests so 2 * 15 = 30 cans of soda. Each pack of soda had 6 cans. He needed to buy 30 cans of soda for his guest so 30 / 6 = 5 packs of soda. The soda was on sale for $3.00 per 6 pack and he was buying 5 packs so 3 * 5 = $15.00 for soda. The answer is 15.