Answer: See explanation
Step-by-step explanation:
Based on the information that's provided in the question, the required adjusting entry goes thus:
Unadjusted ending balance of supplies = $490
Actual supplies ending balance existing physically = $175
From the information above, the supplies used during the period will be:
= $490 - $175
= $315
Therefore,
Debit office supplies expenses $315 Credit office supplies account $315