[Question]: A baker bought cooking ingredients in the supermarket. She bought 3 boxes of flour that cost $3 each box, 3 trays of eggs that cost $10 for each tray, 7 liters of milk that cost $5 each liter, and 2 boxes of baking soda that cost $3 each box. How much will she have to pay for everything?
[Answer]: The total cost for the flour is 3 x $3 = $9. The total cost of the tray of eggs is 3 x $10 = $30. The total cost for the liter of milk is 7 x $5 = $35. The total cost for the box of baking soda is 2 x $3 = $6. Therefore, the total cost for all the ingredients is $9 + $30 + $35 + $6 = $80.
So the answer is 80.

[Question]: Melly's two cats each have litters of kittens at the same time. The first cat has 3 blue-eyed kittens and 7 brown-eyed kittens. The second cat has 4 blue-eyed kittens and 6 brown-eyed kittens. What percentage of all the kittens have blue eyes?
[Answer]: First find the total number of blue - eyed kittens: 3 kittens + 4 kittens = 7 kittens. Then find the total number of brown - eyed kittens: 7 kittens + 6 kittens = 13 kittens. Then add the number of each type of kitten to find the total number of kittens: 7 kittens + 13 kittens = 20 kittens. Then divide the number of blue - eyed kittens by the total number of kittens and multiply by 100% to express the answer as a percentage: 7 kittens / 20 kittens * 100% = 35%.
So the answer is 35.

[Question]: Dr. Jones earns $6,000 a month. His house rental is $640 each month; his monthly food expense is $380; his electric and water bill costs 1/4 of what he makes, and his insurances cost 1/5 of what he makes. How much money does he have left after paying those four bills?
[Answer]:
Dr. Jones pays $6000 / 4 = $ 1500 for his electric and water bill. He pays $6000 / 5 = $1200 for his insurances. The total amount he pays for the bills and insurances is $1500 + $1200 = $2700. The remaining money from his earning after paying off the bills and insurance is $6000 - $2700 = $3300. The total amount he needs to pay for the rent and food expenses is $640 + $380 = $1020. So, Dr. Jones has $3300 - $1020 = $2280 left.
So the answer is 2280.