Kubin company's relevant range of production is 17,000 to 26,500 units. when it produces and sells 21,750 units, its average costs per unit are as follows: average cost per unit direct materials $ 7.80 direct labor $ 4.80 variable manufacturing overhead $ 2.30 fixed manufacturing overhead $ 5.80 fixed selling expense $ 4.30 fixed administrative expense $ 3.30 sales commissions $ 1.80 variable administrative expense $ 1.30 required: 1. for financial accounting purposes, what is the total amount of product costs incurred to make 21,750 units? 2. for financial accounting purposes, what is the total amount of period costs incurred to sell 21,750 units? 3. for financial accounting purposes, what is the total amount of product costs incurred to make 26,750 units? 4. for financial accounting purposes, what is the total amount of period costs incurred to sell 17,000 units?