ldentify each cost below as variable (V), fixed (F), or mixed (M), relative to units sold. Explain your reason. (Select the corresponding number of the correct reason in the table.) (Click the icon to view a list of reasons.) 100 Units Sold a. Total phone cost b. Materials cost per unit c. Manage's salary 25 50 75 V, F, or M Reason $150 $ 200 $ 250 $ 300 35 3,000 3,000 3,000 3,000 35 35 35 More Info 1. Does not change in total over wide ranges of volume/inversely proportional to 2. It is directly proportional to the number of units produced. The total cost 3. The total cost changes as volume changes, but not in direct proportion the number of units produced while total cost remains constant changes as volume changes and in direct proportion