Q: Jim buys a package of 20 car washes. Since He bought a package he only has to pay 60%. A carwash normally costs 15 dollars. How much did he pay for the package?
A: He had to pay for 20 * .6 = 12 car washes. That means he had to pay 12 * 15 = $180. The answer is 180.

Q: If I read 4 novels with 200 pages each in a month, how many pages of novels will I read in a year?
A: Since each novel has 200 pages, you read 4 * 200 = 800 pages of novels every month. Since a year has 12 months, you will read 800 * 12 = 9600 pages in a year. The answer is 9600.

Q: On Monday, while at work on the farm, Jeremy picks 100 oranges. On Tuesday, together with his brother, they pick thrice as much. On Wednesday he feels tired and is only able to pick 70 oranges. What's the total number of oranges they have?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
On Monday he picks 100 oranges. On Tuesday, they pick thrice as much, which will be 3 * 100 = 300 oranges. The total number of oranges picked now is 300 + 100 = 400 oranges. On Wednesday, he adds 70 more, which will now be 400 + 70 = 470 oranges. The answer is 470.