An organization operates a piecework system of remuneration, but also guarantees its employees 80% of a time-based rate of pay, which is based on $20 per hour for an eight-hour working day. Three minutes is the standard time allowed per unit of output. Piecework is paid at the rate of $18 per standard hour. If an employee produces 200 units in eight hours on a particular day, what is the employee’s gross pay for that day?