Final answer:
Erwin's bank statement must show a credit of $20 and a debit of $5 to result in the end balance of $15. Option B is the correct answer as it is the only one that aligns with the given scenario and the existence of one credit and one debit.
Step-by-step explanation:
To determine the amounts shown on Erwin's bank statement that resulted in a balance of $15 at the end of the month, we can analyze the options provided. Erwin started with a bank balance of $0. After one credit and one debit, his balance became $15. The credit adds to his balance, and the debit subtracts from it.
Let's look at the options:
- A. Credit: $10, Debit: $5: If $10 is credited and $5 is debited, Erwin's final balance would be $10 - $5 = $5, which is not the final balance he has.
- B. Credit: $20, Debit: $5: If $20 is credited and $5 is debited, the final balance would be $20 - $5 = $15, which matches Erwin's ending balance.
- C. Credit: $15, Debit: $0: If $15 is credited and nothing is debited, the final balance would be $15, which is also correct. However, the question mentions one debit, so this option can be ruled out as it suggests there was no debit.
- D. Credit: $5, Debit: $10: This would result in a negative balance, which does not match Erwin's final balance.
Based on this analysis, the correct option is B. Credit: $20, Debit: $5.