Final answer:
The appropriate adjusting entry for the supplies is to debit Supplies Expense for $7,700 and credit Supplies for $7,700, thereby matching the expense with the period in which it is incurred and reflecting the correct amount of supplies remaining. Option c.
Step-by-step explanation:
The correct adjusting entry to record the supplies expense for Foley Advertising Co, given that the trial balance shows Supplies at $8,800 and there are $1,100 of Supplies on hand at the end of the period, would be option c. Here's how you calculate it:
The company started with $8,800 in supplies and ended with $1,100. The amount used is $8,800 - $1,100 = $7,700. Therefore, you need to Debit Supplies Expense for $7,700 to record the supplies used during the period and Credit Supplies for $7,700 to reduce the balance in the Supplies account to the amount actually on hand.
The adjusting entry is thus:
Debit Supplies Expense $7,700;
Credit Supplies $7,700. Option c.