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. For financial accounting purposes, what is the total product cost incurred to make 20,000 units? 2. For financial accounting purposes, what is the total period cost incurred to sell 20,000 units? 3. For financial accounting purposes, what is the total product cost incurred to make 22,000 units? 4. For financial accounting purposes, what is the total period cost incurred to sell 18,000 units? Note: For all requirements, do not round intermediate calculations