Costs can be classified into two categories, fixed and
variable costs. These costs behave differently based on the level of sales
volumes. Suppose we are running a restaurant and have identified certain costs
along with the number of annual units sold of 1000.

Item: Raw Materials (cost for hamburgers)

Total Annual Cost: 650

Item: Building Rent

Total Annual Cost: 9000

Identify which cost item above is fixed and variable and
why? What is the cost per unit of each? Suppose we increased our sales volume
to 6000 units and then to 8000 units the following year (and are still within
the relevant range), what would be the total annual cost and unit cost of fixed
and variable costs?

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