Lisa is enrolled in a defined benefit plan. She has worked 6 years for the plan. Her salaries were $25,000, $30,000, $35,000, $40,000, $45,0 00, and $50,000. The defined benefit plan allows for a benefit of 3% for every year of service of their average salary for their three highest years. The company uses a 7-year vesting schedule. What annual benefit has Lisa vested? (also known as her taxable benefit) $540 $6,480 $1,080 $3,240