Mateo 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. The selling price is $3.00 per unit. Assume that all of the activity levels mentioned in this problem are within the relevant range. Required: Predict the following items for Mateo Company: (a) Variable cost per unit. (b) Total fixed cost per period. (c) Total expected costs at the 18,000-unit level of activity. (d) Total Contribution Margin at the 18,000 unit level of production and sales