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                                      Finance for Non-Financial Managers
                               128
                               Fixed and Variable Expenses in the Factory
                               In any department of every company, including the manufactur-
                               er’s shop floor, there are costs that do not change from day to
                               day and there are costs that are changing constantly, depending
                               on the company’s level of activity. Understanding costs that
                               change and those that don’t is important to the manager’s abili-
                               ty to manage the costs for which he or she is responsible.
                                   Costs that essentially remain unchanged even though the
                               business increases its volume of sales are called fixed costs.
                               Such costs may be more easily predicted and managed,
                               because they stay pretty much the same. An example is the
                               rent on a building that is occupied under a long-term lease. For
                               the most part, that monthly lease payment will remain
                               unchanged for the life of the lease, predefined increases aside.
                               Another example is depreciation expense on an asset, which
                               will remain constant until the asset is removed from service,
                               assuming it lasts as long as intended.
                                   Costs that increase in direct relationship to sales volume are
                               called variable costs. For example, a 10% increase in sales will
                               result in a 10% increase in variable costs. You can see that
                               direct materials and direct labor would be variable—the more
                               units you make, the more of those costs you would incur.
                               Packaging materials used in shipping the finished goods would
                               also vary with production levels.
                                   Costs that increase in relation to sales but at a slower pace,
                               for example 5% for each 10% increase in sales, are said to be
                               semi-fixed costs, meaning they have aspects of variable costs
                               and also aspects of fixed costs. For example, a manufacturing
                               scrap pickup service might accept larger amounts of scrap
                               without raising its prices for pickup until it needs to send a larg-
                               er truck and two operators. Then it might increase the price and
                               keep it fixed for a while, until the larger truck can no longer haul
                               more scrap away. The cost over time becomes semi-fixed as
                               sales, and therefore manufacturing scrap, increase.
                                   We try to label every cost element as either fixed or variable
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