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): $76, 500 per year Variable costs (supplies): $1.50 per maintenance hour Calculate a single charging rate for the Maintenance Department. Round your answer to the nearest cent. $ per maintenance hour 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 $ What if the Assembly Department used 3, 300 maintenance hours in the year? How much would have been charged out to the three departments? Assembly Department charge $ Fabricating Department charge Packaging Department charge Total amount charged $