Key:1=Fixed Cost 2-Variable Cost 3-Mixed Cost 4 Not assignable to the cost object Required Using the above key, indicate whether each of the items listed below is a fixed, variable, or mixed cost where the sustomer service department is the cost object and the number of customer orders is the cost driver Customer Service department manager salary Customer Service department utility costs Customer Service department order documents Customer Service department office cleaning supplies_ Production department supplies -Vice President of Production's Salary Distribution department overtime pay Customer Service department equipment depreciation