Andy's Advertising Ltd.'s unadjusted balance in its Office Supplies account was $785. A count of the supplies on December 31 revealed a balance remaining balance of $510. REQUIRED: a. Calculate the amount of office supplies used. b. Prepare the adjusting journal entry required at December 31. Format BI Uy A Go + V ... a. The amount of supplies used = $ $ b. The adjusting journal entry: GENERAL JOURNAL ACCOUNT TITLES AND DEBIT CREDIT DATE EXPLANATION