Can someone please explain how to fill out a trial balance!

Exercise 3-12 The T-accounts below summarize the ledger of Wheeling Gardening Company, Inc. at the end of the first month of operations. Cash Apr. 1 Apr. 12 Apr. 29 Apr. 30 15,000 Apr. 15 800 700 Apr. 25 800 900 3,500 Accounts Receivable 3,400 Apr. 29 Supplies Apr. 7 800 Apr. 4 5,200 Accounts Payable 3,500 Apr. 4 Unearned Service Revenue Apr. 25 5,200 Apr. 30 900 Common Stock Apr. 1 15,000 Service Revenue 3,400 700 Apr. 7 Apr. 12 Salaries and Wages Expense Apr. 15 800