A firm has the following total revenue and total cost schedules: TR = $3Q. TC = $4,500 + $1.6Q. What is the break-even level of output? Round your answer to the nearest whole number. units What is the level of profits at sales of 4,700 units? Round your answer to the nearest dollar. $ As the result of a major technological breakthrough, the total cost schedule is changed to: TC = $6,000 + $0.8Q. What is the break-even level of output? Round your answer to the nearest whole number. units What is the level of profits at sales of 4,700 units? Round your answer to the nearest dollar