Carlos Martin received a statement from his bank showing a balance of $56.75 as of March 15th. His checkbook shows a balance of $87.37 as of March 20. The bank returned all the cancelled checks but two. One check was for $5.00 and the other was for $13.25. How much did Carlos deposit in his account between the March 15 and the March 20?

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48.87

To find out how much Carlos deposited in his account between March 15th and March 20th, we need to calculate the difference between the balances shown in his bank statement and his checkbook.

The balance on Carlos' bank statement on March 15th was $56.75, and the balance in his checkbook on March 20th was $87.37. This means that Carlos had $87.37 - $56.75 = $30.62 more money in his checkbook than what was shown in his bank statement.

Now, we need to consider the two cancelled checks that were not returned by the bank. One check was for $5.00, and the other was for $13.25. So, Carlos spent a total of $5.00 + $13.25 = $18.25 from the extra money he had in his checkbook.

To find out how much Carlos deposited in his account, we need to subtract the amount he spent ($18.25) from the extra money in his checkbook ($30.62). Therefore, Carlos deposited $30.62 - $18.25 = $12.37 in his account between March 15th and March 20th.