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 sold? 3. If 18,000 units are produced and sold, what is the total amount of variable cost related to the units produced and sold? 4. If 22,000 units are produced and sold, what is the total amount of variable cost related to the units produced and sold? 5. If 18,000 units are produced, what is the average fixed manufacturing cost per unit produced? 6. If 22,000 units are produced, what is the average fixed manufacturing cost per unit produced? 7. If 18,000 units are produced, what is the total amount of fixed manufacturing overhead incurred to support this level of production? 8. If 22,000 units are produced, what is the total amount of fixed manufacturing overhead incurred to support this level of production? (Round per unit values to 2 decimal places.)