Q: In a certain country store, there are three kinds of bottled drinks. A cola, which costs $3, a juice for $1.5, and water for $1 per bottle. One day the store was able to sell 15 bottles of cola, 25 bottles of water, and 12 bottles of juice. How much did the shop earn?
A: 15 bottles of cola is a cost of 15 * 3 = $45. 12 bottles of juice make up to 12 * 1.5 = $18. As each of the 25 sold water bottles was $1, the shop made a total of 45 + 18 + 25 = $88. The answer is 88.

Q: There are 30 players on a football team. The coach has 8 liters of water. She pours 200 milliliters of water for every player so they can get hydrated. Unfortunately, there was a water spill and 250ml of water was spilled. How much water was left over?
A: The coach has 8 liters * 1000 ml / liter = 8,000 ml of water. She pours 200 ml / player x 30 players = 6,000 ml of water in total for all the athletes. The water spill means 6,000 ml + 250 ml = 6,250 ml of water was used. There was 8,000 ml - 6,250 ml = 1,750 ml of water left. The answer is 1750.

Q: There are 10 cars parked in a mall’s parking lot, each with the same number of customers inside. Each customer only makes 1 purchase. If the sports store makes 20 sales and the music store makes 30 sales, how many customers are in each of the cars?
A:
As each sale represents a customer, there must be a total of 20 sports store sales + 30 music store sales = 50 customers. There is an equal number of customers in every car, so there must be 50 total customers / 10 cars = 5 customers in each car. The answer is 5.