please ensure they are both displayed as a percent and show how to do it

A distributor sells water cooling units for $850 each. The operating profit is 25% on cost and markup is 60% on cost. a. Calculate the cost per cooling unit. $531.25 Round to the nearest cent b. Calculate the rate of markdown offered during a sale if it made a profit of $48.40 per machine. b. Calculate the rate of markdown offered during a sale if it made a profit of $48.40 per machine. % %) Round to two decimal places c. What should be the rate of markdown offered to sell the machines at the cost price? % Round to two decimal places