can you help me with the adjusting entries #8, 10, 11, 12 and 15 please? And also explain to me how you get them, thanks a lot

Sullivan Equipment Sales showed the following. 2020 Jan. 15 Sold $26,000 of merchandise for $31,000 to Janco; terms 3/5, n/15. 16 Wrote off Fedun's account in the amount of $16,000. 20 Mar. 1 Apr. 15 ? Collected the amount owing from the January 15 sale. Accepted a $12,400, 60-day, 7% note dated this day in granting Parker Holdings a time extension on its bastdue account. Sold merchandise costing $63,000 for $73,000 to customers who used their Visa credit cards. Visa charges a 1% fee and deposits the cash electronically into the retailer's account immediately at the time of sale. Parker Holdings honoured the note dated March 1. Accepted a $26,60e, three-month, 6% note dated this day in granting Grant Company a time extension on its past-due account. Sullivan's year-end. Interest was accrued on outstanding notes receivable. Bad debts are based on an aging analysis that estimated $9,700 of accounts receivable are uncollectible. Allowance for Doubtful Accounts showed an unadjusted credit balance of $1,700 on this date. Nov. 1 Dec. 31 31 2021 ? Grant Company dishonoured its note dated November 1, 2020. Recovered $1,500 from Derek Holston that was previously written off. Mar. 5 14 Wrote off the Grant Company account. No Transactions Debit Credit General Journal Accounts receivable - JanCo 1 a. 31,000.00 Sales 31,000.00 2 b. 26,000.00 Cost of goods sold Merchandise inventory 26,000.00 . 3 16,000.00 C. Allowance for doubtful accounts Accounts receivable - Fedun 16,000.00 4 d. Cash Sales discounts Accounts receivable - JanCo 30.070.00 930.00 31,000.00 12,400.00 5 e. Notes receivable Parker Holdings Accounts receivable - Parker Holdings 12,400.00 6 f. Cash 72,270.00 730.00 Credit card expense Sales 73,000.00 63,000.00 7 g Cost of goods sold Merchandise inventory 63,000.00 8 h. Cash Interest income Notes receivable - Parker Holdings 26,000.00 9 i. Notes receivable - Grant Company Accounts receivable - Grant Company 26,000.00 10 j Interest receivable Interest income 11 K. Bad debt expense Allowance for doubtful accounts 12 1. Accounts receivable - Grant Company Interest receivable Interest income Notes receivable - Grant Company 1,500.00 13 m Accounts receivable - Derek Holston Allowance for doubtful accounts 1,500.00 1,500.00 14 n Cash Accounts receivable --Derek Holston 1,500.00 15 0. Allowance for doubtful accounts Accounts receivable - Grant Company