Transaction Entries, Posting, Trial Balance, and Adjusting Entries Mark Gold opened Gold Roofing Service on April 1. Transactions for April are as follows: 1 Gold contributed his personal funds in exchange for common stock to begin the business. $15,000 2 Purchased a used truck for cash. 6,100 3 Purchased ladders and other equipment for a total of 3,100 Paid cash of $1,000, with the balance due in 30 days. 4 Paid two-year premium on liability insurance. 6,000 5 Purchased supplies on account 1,200 6 Received an advance payment from a customer for roof repair work to be done in April and May. 1,800 7 Billed customers for roofing services. 9,000 8 Collected on account from customers. 6,500 9 Paid bill for truck fuel used in April. 75 10 Paid April newspaper advertising. 100 11 Paid assistants' wages. 4,500 12 Billed customers for roofing services. 5,000