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6.4 Transportation cost structures

There are basically three types of costs associated with transportation. These are fixed costs, variable costs and common or joint costs. Let us briefly discuss each of these types of costs.

Fixed costs. Fixed costs are those that do not vary with change in output; in other words, they are constant regardless of the firm's activities. Examples of fixed costs would include capital outlay for roadways, terminals, transport vehicles and equipment and carrier administration.

Variable costs. Variable costs change as the output varies. They include costs such as fuel and labour, equipment maintenance, handling, pickup and delivery. The easiest way to determine whether a certain element of cost is fixed or variable is to assume that the business has shut down, in which case if the cost is still incurred it would be a fixed one. However, in the long run even fixed costs are said to vary. As there are significant cost differences between transportation modes, there is no precise allocation between fixed and variable costs for some of a firm's activities. Some costs are partly fixed and partly variable and allocation of cost elements into one class or the other is a matter of individual perspective. Examples are costs related to maintenance and handling.

Besides the fixed and variable costs discussed above, there are other costs incurred which have no simple formula for cost allocation and production costs on a per shipment basis remain a matter of judgement. For example, the costs incurred by carriers on their return or backhaul service need to be taken into account in the total costing. These costs are categorised under common or joint costs. It is assumed that the forward haul is the heavy traffic direction and the backhaul is the light traffic direction. However, this may not always be true, especially if carriers offer shippers heavy discounts on the backhaul service.

In your text

Please read pages 187-189 (Chapter 6) of your text, which describe the cost characteristics of the five modes of transportation.

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