The cost for the 4 days of rental is $25 \times 4 = $100.
The cost for the 400 miles driven is $0.20 \times 400 = $80.
Therefore, Ivan needs to pay $100 + $80 = $\boxed{180}.The answer is: 180
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Ivan rents a car for $25 a day and $0.20 per mile, and he rents it for 4 days and drives it 400 miles, how much money does he need to pay?

### Answer:
