Answer:
A) debit to office supplies expense for $2,800
Explanation:
When Supplies is purchased, Debit supplies and credit Cash/Accounts payable. As Supplies are used up, debit supplies expense (with the amount used) and Credit Supplies account.
The movement in the balance of supplies at the start and end of a period is as a result of usage and purchases. While usage reduces the balance in supplies, purchases increases the balance. This may be expressed mathematically as
Opening balance + purchases - units used = closing balance
Hence,
$800 + $2500 - amount used = $500
amount used up = $800 + $2500 - $500
= $2800