I need help with 5-8

Thunderduck Shoes relevant range of production is 7,500 units to 12,500 units. When it produces and sells 10,000 units, its unit costs are as follow: Amount Per Unit Direct materials Direct labor Variable manufacturing overhead Sales commissions Variable administrative 6.00 3.50 1.50 1.00 0.50 Total Amount 40,000 30,000 20,000 Fixed manufacturing overhead Fixed selling expense Fixed administrative expense 1. What is the total amount of product cost to make 8,000 units? Per unit? 2. What is the total amount of period cost to make 8,000 units? 3. If 12,500 units are sold, what is the variable cost per unit sold? 4. If 12,500 units are produced, what is the total amount of fixed manufacturing overhead cost incurred to support this level of production? 5. If 7,500 units are produced, what is the total amount of manufacturing overhead costs incurred to support this level of production? 6. If the selling price is $22 per unit, what is the contribution margin per unit sold? 7. If the selling price is $22 per unit and 8,000 units were sold, what is the gross margin per unit sold? 8. If9,000 units are produced, what is the prime and conversion cost