Answer the following question.
John used to buy 4 coffees a day for $2 each. They raised the price by 50% so he cut the number of coffees he drinks in half. How much money does he save per day compared to what he used to spend?
Step-by-step reasoning process: He now buys 4 / 2 = 2 coffees. The new price is 2 * .5 = $1 more than the old price. So he now pays 2 + 1 = $3 per coffee. So he spends 3 * 2 = $6. He used to spend 4 * 2 = $8. So he saves 8 - 6 = $2 per day.
The answer is 2.

Answer the following question.
Lidia has a collection of books. Her collection is four times bigger than the collection which her friend Susan has. In total Susan and Lidia, both have 3000 books. How many books does Susan have in her collection?
Step-by-step reasoning process: Let x be the number of books in Susan's collection. The collection of both Susan and Lidia would then be 4 * x + x = 3000. 5 * x = 3000. x = 600.
The answer is 600.

Answer the following question.
The population of Port Perry is seven times as many as the population of Wellington. The population of Port Perry is 800 more than the population of Lazy Harbor. If Wellington has a population of 900, how many people live in Port Perry and Lazy Harbor combined?
Step-by-step reasoning process: Population of Port Perry is 900 * 7 = 6,300. Population of Lazy Harbor is 6,300 - 800 = 5,500. Combined population is 6,300 + 5,500 = 11,800.
The answer is 11800.

Answer the following question.
Angie bought three times as many pretzels at the mall as Shelly did. Shelly bought half as many pretzels as Barry. If Barry bought 12 pretzels, how many did Angie buy?
Step-by-step reasoning process: Shelly bought 12 / 2 = 6 pretzels. Angie bought 6 * 3 = 18 pretzels.
The answer is 18.