Answer the following question.
The PTA had saved $400 set aside after a fundraising event. They spent a fourth of the money on school supplies. Then they spent half of what was left on food for the faculty. How much money did they have left?
Step-by-step reasoning process: They spent $400 / 4 = $100 on school supplies. They spent $300 / 2 = $150 on food. They had $300 - 150 = $150 left.
The answer is 150.

Answer the following question.
Hannah harvests 5 strawberries daily for the next whole month of April, which has 30 days. If she gives away 20 strawberries to her friends and 30 strawberries are stolen, how many strawberries does she have by the end of April?
Step-by-step reasoning process: Hannah harvests a total of 5 * 30 = 150 strawberries. After giving her friends, Hannah is left with 150 - 20 = 130 strawberries. After some were stolen, Hannah is left with 130 - 30 = 100 strawberries.
The answer is 100.

Answer the following question.
Bob grew corn in his garden this year and ended up with 50 bushels. This is way too much for him to eat, so he gave some of it away to his friends. His friend Terry took 8 bushels, while Jerry only took 3. He gave 12 bushels to his friend Linda, who runs a food pantry. His neighbor Stacy doesn't eat much corn, but she still accepted 21 ears of corn from him. If each bushel contained 14 ears of corn, how many ears of corn does Bob have left?
Step-by-step reasoning process: Stacy took 21 ears of corn, there are 14 ears to a bushel, so she took 21 ears / 14 ears / bushel = 1.5 bushels of corn. In all, Bob gave away 8 bushels + 3 bushels + 12 bushels + 1.5 bushels = 24.5 bushels of corn. This leaves him with 50 bushels - 24.5 bushels = 25.5 bushels of corn. At 14 ears of corn per bushel, Bob has 25.5 bushels * 14 ears per bushel = 357 ears of corn.
The answer is 357.

Answer the following question.
Derek finally gets his own allowance. He puts $2 away in January, $4 away in February, $8 away in March, $16 away in April and follows this savings pattern through to December. How much money does he have to spare and save by December?
Step-by-step reasoning process: Derek doubles his allowance savings each month, so in May, Derek has $16 * 2 = $32. In June, Derek has $32 * 2 = $64. In July, Derek has $64 * 2 = $128. In August, Derek has $128 * 2 = $256. In September, Derek has $256 * 2 = $512. In October, Derek has $512 * 2 = $1024. In November, Derek has $1024 * 2 = $2048. By December, Derek has $2048 * 2 = $4096 to save.
The answer is 4096.