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(15 points) There are three (3) short answer problems, You must answer two (2) of them. B8B Company's average cost per unit is \\( \\$ 1.425 \\) at the 16,000 unit level of activity and \\( \\$ 1.38 \\) at the 20,000 unit level of activity. Assume that all of the activity ievels: mentioned in the problem are within the relevant range (Show all work to recelve credit). Required: a. Variable cost por unit. b. Total fixed cost por period. c. Total expected cost at the 18,000 unit level of activity