can you please help me with this please, I don't know why I am wrong!

RIVERBED TRIALBALANCE DECEMBER 31, 2020 Cash $33,500DebitCredit Accounts Receivable 47,400 Allowance for Doubtful Accounts $3,050 Supplies 3,180 Prepaid Insurance Equipment 33,000 Accumulated Depreciation-Equipment Notes Payable Owner's Capital Service Revenue Rent Expense 7,800 Salaries and Wages Expense 28,750 Utilities Expenses 1.280 1. Fees received in advance from clients $6,000, which were recorded as revenue, 2. Services performed for clients that were not recorded by December 31,$5,900. 3. Equipment is being depreciated at 8% per year. 4. Bad debt expense for the year is $1,440. 5. Insurance expired during the year $500. 6. Riverbed gave the bank a 90 -day, 5% note for $9,600 on December 1,2020 . 7. Rent of the building is $600 per month. The rent for 2020 has been paid, as has that for January 2021. 8. Office salaries and wages earned but unpaid December 31,2020,$1,520. Riverbed withdrew $12,000 cash for personal use during the year. Prepare a statement of owner's equity for 2020. (List items that increase owner's equity first.)