Used office supplies of $2,330. The Office Supplies unadjusted balance on December 31 is $10,700. Adjustment Type: Supplies Expense Office Supplies The unadjusted balance of Office Supplies at Dec. 31 is $9,900 and at year end the office supplies on hand totaled $3,070. Adjustment Type: Supplies Expense Office Supplies III Customers were billed for $4,900 for work completed. The Service Revenue unadjusted balance as of December 31 is $7,000. Adjustment Type: Accounts Receivable Service Revenue I. Journalize the adjusting entry needed at December 31 for each situation. Use the Chart of Accounts to review account names! Customers were billed for $1,000 for work completed. Date Accounts and Explanation Debit Credit Incurred interest expense of $3,800 Date Accounts and Explanation Debit Credit Depreciation for the current year includes Equipment, $4,200. Date Accounts and Explanation Debit Credit