The following cost graphs illustrate various types of cost behavior:

For each of the following costs, identify the cost graph that best illustrates its cost behavior as the number of units produced increases.a. Total direct materials costb. Electricity costs of $2,000 per month plus $0.09 per kilowatt-hourc. Per-unit direct labor costd. Salary of quality control supervisor, $10,000 per monthe. Per-unit cost of straight-line depreciation on factoryequipment

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Cost Graph One Cost Graph Two Total Units Produced Total Units Produced Cost Graph Three Cost Graph Four Total Units Produced Total Units Produced