For each of the following statements, indicate whether it is true, false, or uncertain. Explain why. Give

Question:

For each of the following statements, indicate whether it is true, false, or uncertain. Explain why. Give examples in your answer.
a. A cost is something used up to produce revenues in a particular accounting period.
b. The cost of direct materials is fixed per unit but variable in total.
c. Variable costs are direct costs; only fixed costs are indirect costs.