eBook Calculating and Using Dual Charging Rates The expected costs for the Maintenance Department of Stazler, Inc., for the coming year inckude Fixed costs (salaries, tools): $64,900 per year hour The Assembly and Packaging departments expect to use maintenance hours relatively evenly throughout the year. The Fabricating Department typically uses more maintenance hours in the month of November. Estimated usage in hours for the year and for the peak month is as follows: Yearly Monthly Hours Peak Hours 4,500 6,700 10,800 22,000 Fabricating Department 1,300 910 2,600 Packaging Department Total maintenance hours Actual usage for the year by: Assembly Department Fabricating Department Packaging Department 3,960 6,800 10,000 20,760 10-26 PM 3/25/2019 20,760 per maintenance hour Fabricating Fabricating 027 PM 3/25/2019 Fabricating Total 0 27 PM 3/25/2019