I need help finding what I am missing in the T-accounts

Required 1-a. Prepare all February journal entries and adjusting entries. (If no entry is required for a transaction/event, select "No Journal Entry Required" in the first account field.) Feb.1Notes Receivable 1,900 Accounts Receivable 1,900 Feb. 2Insurance Expense 700 Cash 700 Feb. 5Inventory 12,750 Accounts Payable 12,750 4 Feb. 6Inventory 340 Cash 340 5Feb. 10a Accounts Receivable 21,000 Sales Revenue 21,000 6 Feb. 10b Cost of Goods Sold 11,365 Inventory 11,365 7 Feb. 15a Unearned Revenue 5,000 Sales Revenue 5,000 8Feb. 15b Cost of Goods Sold 3,080 Inventory 3,080