Carlos Martin received a statement from his bank showing a balance of 55.75 as of March 15. His checkbook shows a balance of 87.37 as of March 20. The bank returned all canceled checks but to. One was for 5.00 and the other was for 13.25. How much did Carlos deposit in his account between March 15 and March 20?

To determine how much Carlos deposited in his account between March 15 and March 20, we can follow these steps:

1. Start with the balance in his bank statement on March 15: $55.75.
2. Add any checks that the bank returned but didn't deduct from the statement balance. In this case, the check amounts are $5.00 and $13.25.
- $55.75 + $5.00 + $13.25 = $74.00 (adjusted statement balance).
3. Compare the adjusted statement balance to the balance in Carlos' checkbook on March 20: $87.37.
4. Subtract the adjusted statement balance from the checkbook balance to find the deposits made during that period.
- $87.37 - $74.00 = $13.37.

Therefore, Carlos deposited $13.37 in his account between March 15 and March 20.