Ken Ham started his own consulting firm, Hambone Consulting, on May 1, 2012. The trial balance at May 31 is as follows. Cash $ 5,700; Accounts Receivable 6,000; Supplies 1,900; Prepaid Insurance 3,600; Office Furniture 10,200; Accounts Payable $ 4,500; Unearned Service Revenue 2,000; K. Ham, Capital 17,700; Service Revenue 7,500; Salaries Expense 3,400; Rent Expense 900. Other 1. $100 of supplies have been used during the month. 2. Travel expense incurred but not paid on May 31, 2010, $250. 3. The insurance policy is for 2 years. 4. $500 of the balance in the unearned service revenue account remains unearned at the end of the month. 5. May 31 is a Wednesday, and employees are paid on Fridays. Hambone Consulting has two employees, who are paid $900 each for a 5-day work week. 6. The office furniture has a 5-year life with no salvage value. It is being depreciated at $180 per month for 60 months. 7. Invoices representing $1,200 of services performed during the month have not been recorded as of May 31.