Calculating and Using a Single Charging Rate The expected costs for the Maintenance Department of Stazler, Inc, for the coming year include: Fixed costs (salaries, tools): $70,560 per year Variable costs (supplies): $1.35 per maintenance hour Estimated usage by: 1. Calculate a single charging rate for the Maintenance Department. found your answer to the nearest cent: per maintenance hour 1. Calculate a single charging rate for the Mainteoance Department. Round your answer to the nearest cent. per maintenance thour 2. Use this rate to assign the costs of the Maiptenance Department to the user depastments based on actuat usage. Calculate the total amount charged for maintenance for the year. 3. What if the Assembly Department used 5,000 maintenance hours in the year? How much would have been charged out to the three departments? When required, round your answers to the nearest dollar