In the first hour, Tina filled the jar with 20 coins.
In the next two hours, she filled the jar with 30 coins each hour, so a total of 30 + 30 = 60 coins.
In the fourth hour, she filled the jar with 40 coins.
So far, she has filled the jar with 20 + 60 + 40 = 120 coins.
But in the fifth hour, her mother borrowed 20 coins, so there are now 120 - 20 = 100 coins left in the jar.
#### 100
The answer is: 100
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
After filling the jar with 20 coins in the first hour, 30 coins in each of the next two hours, and 40 coins in the fourth hour, Tina's mother borrowed 20 coins in the fifth hour. How many coins are left in the jar after the fifth hour?

### Answer:
