Required information [The following information applies to the questions displayed below] Kubin Company's relevant range of production is 18,000 to 22,000 units. When it produces and sells 20,000 units, its average costs per unit are as follows: Required: 1. If 18,000 units are produced and sold, what is the variable cost per unit produced and sold? 2. If 22,000 units are produced and sold, what is the variable cost per unit produced and soid