pls fix the wrong answers in the red boxes. infos are down below

Bal. 22.400 Feb. 1 3000 Feb. 1 6000 Mar. 1 9600 Mar. 29 143000 Mar. 29 16150 Mar. 31 1940 Mar. 29 96000 Accounts Receivable Bal. 23,000 Mar. 29 143000 Mar 28 150000 Mar 31 200 Allowance for Doubtful Accounts Mar 31 200 Bal. 1,200 Equipment Bal. 24,000 Mar. 31 13000 Feb. 1 9000 Accumulated Depreciation-Equipment Mar. 31 10200 Bal. 11,000 Mar 31 600 Land Bal. 20,000 Buildings Bal. 121,000 Accumulated Depreciation-Buildings Bal. 11,000 Patents Mar. 1 9600 Accounts Payable Mar. 29 16150 Bal. 12,150 Feb. 1 6000 Unearned Service Revenue Feb. 1 6000 Common Stock Bal. 86,000 CONCORD CORPORATION Post-Closing Trial Balance December 31, 2021 Debit Credit Cash $22,400 Accounts Receivable 23,000 Allowance for Doubtful Accounts $1,200 Equipment 24,000 Accumulated Depreciation-Equipment 11,000 Buildings 121,000 Accumulated Depreciation-Buildings 11,000 Land 20,000 Accounts Payable 12,150 Common Stock 86,000 Retained Earnings 89,050 $210,400 $210,400 During the first quarter of 2022, the following transactions occurred: 1 2. 3. 4. On February 1. Concord collected fees of $6,000 in advance. The company will perform $500 of services each month from February 1, 2022, to January 31, 2018. On February 1, Concord purchased computer equipment for $9,000 plus sales taxes of $600 $3,000 cash was paid with the rest on account Check #455 was used. On March 1, Concord acquired a patent with a 10-year life for $9,600 cash. Check #456 was used. On March 28, Concord recorded the quarter's sales in a single entry. During this period, Concord had total sales of $150,000 (not including the sales referred to in item 1 above). All of the sales were on account On March 29, Concord collected $143,000 from customers on account On March 29. Concord paid $16.150 on accounts payable. Check #457 was used. On March 29, Concord paid other operating expenses of $96,000. Check #458 was used. On March 31. Concord wrote off a receivable of $200 for a customer who declared bankruptcy. On March 31. Concord sold for $1,940 equipment that originally cost $13,000. It had an estimated life of 5 years and salvage of $1,000. Accumulated depreciation as of December 31, 2021, was $9,600 using the straight line method. (Hint: Record depreciation on the equipment sold, then record the sale.) 5. 6. 7. 8. 9