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): $79,005 per year Variable costs (supplies): $1.35 per maintenance hour Required: 1. Calculate a single charging rate for the Maintenance Department. Round your answer to the nearest cent. $ per maintenance hour $ Assembly Department charge Fabricating Department charge Packaging Department charge Total amount charged