[Question]Edmund is buying a new computer and needs to save up $75 before he has enough. He convinces his parents to pay him for extra chores. He normally has to do 12 chores a week. His parents agree to pay him $2 for every extra chore he does during the week. If he does 4 chores a day for two weeks, how much does he earn?
[Answer]In two weeks, he has to do 24 chores because 2 x 12 = 24. He now does 28 chores a week because 7 x 4 = 28. He does 56 chores in two weeks because 2 x 28 = 56. He has done 32 extra chores because 56 - 24 = 32. He earns $64 because 2 x 32 = 64. The answer is 64.

[Question]How much money did you make if you sold 220 chocolate cookies at $1 per cookie and 70 vanilla cookies at $2 per cookie?
[Answer]You sold 220 chocolate cookies at $1 per cookie earning 220 x 1 = $220. You sold 70 vanilla cookies at $2 per cookie earning 70 x 2 = $140. In total you earned 220 + 140 = $360. The answer is 360.

[Question]James has to refuel his plane. It used to cost $200 to refill the tank. He got an extra tank to double fuel capacity. Fuel prices also went up by 20%. How much does he pay now for fuel?
[Answer]The cost to fill a tank went up 200 * .2 = $40. So it cost 200 + 40 = $240 to fill the tank. That means he now pays 240 * 2 = $480. The answer is 480.

[Question]Roger bought a house for $100,000. He was able to pay 20% down, and his parents paid off an additional 30% of the remaining balance. How much money does Roger still owe on his house?
[Answer]
100000(.20) = 20000$ down payment. 100000 - 20000 = $80000 remaining. 80000(.30) = 24000. 80000 - 24000 = 56000$. The answer is 56000.