Help with the incorrect, Please!

Novak Corp.'s balance sheet at December 31, 2021, is presented below. NOVAK CORP. Balance Sheet December 31, 2021 Cash $39,360 Accounts payable $40,960 Accounts receivable 72,800 Common stock ($10 par) 128,000 Allowance for doubtful accounts (2,400) Retained earnings 203,840 Supplies 7,040 Land 64,000 Buildings 227,200 Accumulated depreciation-buildings (35,200) $372,800 $372,800 During 2022, the following transactions occurred. 1. On January 1, Novak issued 1,920 shares of $40 par, 7% preferred stock for $78,720. 2. On January 1, Novak also issued 1,440 shares of the $10 par value common stock for $33,600. 3. Novak performed services for $512,000 on account. On April 1, 2022, Novak collected fees of $57,600 in advance for services to be performed from April 1, 2022, to March 31, 2023. 4. 5. Novak collected $441,600 from customers on account. 6. Novak bought $56,160 of supplies on account. 7. Novak paid $51,520 on accounts payable. 8. Novak reacquired 640 shares of its common stock on June 1 for $28 per share. 9. 10. Paid other operating expenses of $301,120. On December 31, 2022, Novak declared the annual preferred stock dividend and a $1.20 per share dividend on the outstanding common stock, all payable on January 15, 2023. 11. An account receivable of $2,720 which originated in 2022 is written off as uncollectible. Adjustment data: 1. A count of supplies indicates that $9,440 of supplies remain unused at year-end. 2. Recorded revenue from item 4 above. 3. The allowance for doubtful accounts should have a balance of $5,600 at year end. 4. Depreciation is recorded on the building on a straight-line basis based on a 30-year life and a salvage value of $ 16,000. 5. The income tax rate is 30%. (Hint: Prepare the income statement up to income before taxes and multiply by 30% to compute the amount.) 1. Cash 78,720 Preferred Stock 76800 Paid-in Capital in Excess of Par Value-Preferred Stock 1920 2. Cash 33600 Common Stock 14400 Paid-in Capital in Excess of Par Value-Common Stock 19200 3. . Accounts Receivable 512000 Service Revenue 512000 4. 4 Cash 57600 Unearned Service Revenue 57600 5. Cash 441600 Accounts Receivable 441600 6. Supplies 56160 Accounts Payable 56160 7. Accounts Payable 51520 Cash 51520 8. Accounts Payable 310120 Cash 310120 9. Other Operating Expenses 22464 Cash 22464 10. Retained Earnings Dividends Payable 11. Allowance for Doubtful Accounts 2720 Accounts Receivable 2720 Adjusting entries 1. Supplies Expense 53760 Supplies 53760 2. Income Summary 43200 Service Revenue 43200 3. Bad Debt Expense 10720 Allowance for Doubtful Accounts 10720 4. Depreciation Expense 7040 Accumulated Depreciation-Buildings 7040 5. Income Tax Expense 54768 Income Taxes Payable 54768