David had the following activity with his checking account during the month of July: Starting checkbook balance of $701.13 July 15 electronic payroll deposit of $1,807.44 Online payment of $109.17 to Ameren Utilities Online payment of $104.00 to Gas Company Checks written on July 15 totaling $984.15 On July 27, he received an electronic payroll deposit of $1,807.43 What was David's checkbook balance as of July 31?