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): $75,480 per year Variable costs (supplies): $1.30 per maintenance hour 1. Calculate a single charging rote for the Maintenance Department. Round your answer to the nearest cent. s. per maintenance hour 2. Use this rate to assign the costs of the Maintenance Department to the user departments based on actual usage. Calculate the total amount charged for maintenance for the year. 3. What if the Assembly Department used 4,000 mointenance hours in the year? How much would have been charged out to the three departments? When required, round your answers to the nearest dollar