The controller of Lamps Limited is concerned about the how much the company's costs have risen over the past few months.Since the majority of the company's costs are mixed, it is hard to tell if the increasing costs are due to variable costs or fixed costs.The controller asks that you research the different ways to separate mixed costs and then to present a report showing the advantages and disadvantages of each method.He would also like you to make a recommendation as to which method should be used.

There are several ways to separate mixed cost . What should i recommend to the controller as to which method should be used