[Question]: Mark constructs a cube of pure gold. The cube is 6 cm on each side. The density of gold is 19 grams per cubic centimeter. He buys the gold for $60 per gram. He sells it for 1.5 times its gold value. What was the profit?
[Answer]: The cube is 6 * 6 * 6 = 216 cubic cm. So it has a mass of 216 * 19 = 4104 grams. So it uses 60 * 4104 = $246240. That means he sells it for 246240 * 1.5 = $369360. So he has a profit of 369360 - 246240 = $123,120.
So the answer is 123120.

[Question]: A café has a few orders to cook and also needs to makes sandwiches for a group of customers that arrived. 3 local offices have each ordered 10 bacon sandwiches and half of the group that has arrived have asked for 4 bacon sandwiches each. If the café makes a total of 54 bacon sandwiches, how many customers are in the group of customers that arrived?
[Answer]: The offices ordered a total of 3 offices * 10 sandwiches each = 30 sandwiches. So the group of customers must have ordered 54 total sandwiches – 30 sandwiches for the offices = 24 sandwiches. This is a total of 24 sandwiches / 4 sandwiches per customer = 6 customers who ordered a sandwich. As only half the group ordered a bacon sandwich, the entire group must have consisted of 6 customers * 2 = 12 customers.
So the answer is 12.

[Question]: Dorothy spent $53 to buy doughnut ingredients. If she made 25 doughnuts and sells each for $3, how much was her profit?
[Answer]:
She was able to earn 25 x $3 = $75 for the doughnuts. Therefore, Dorothy's profit is $75 - $53 = $22.
So the answer is 22.