Carlos Martin received a statement from his bank showing

a balance of $56.75 as of March 15. 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 March 15 and March 20?

1 answer

87.37-56.75 = 30.62

5 + 13.25 = 18.25

30.62 - 18.25 = ?