Luis received his account statement. He needs to make sure the balance in his checkbook register is correct. To reconcile his checkbook, the first thing he should do is _____.
subtract all of the deposits that appear in the register, but are not on the statement
put a checkmark next to all the transactions in the register that appear on the statement
add all of the transactions together
add all of the deposits that appear in the register, but are not on the statement