The expected costs for the Maintenance Department of Stazler, Inc., for the coming year include: Fixed costs (salaries, tools): $74,520 per year Variable costs (supplies): $1.45 per maintenance hour Required: 1. Calculate a single charging rate for the Maintenance Department. Round your answer to the nearest cent. $ 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 maintenance hours in the year? How much would have been charged out to the three departments? When required, round you answers to the nearest dollar