There are two methods of determining product cost: the absorption costing method

There are two methods of determining product cost: the absorption costing method and the variable costing method.
Explain how costs are calculated using both the absorption costing method and the variable costing method.
Which method is required by the generally accepted accounting principles (GAAP)?
Develop an example in columnar format that compares the two methods of cost calculation using the following table:
The unit product cost of the company is computed as follows:
Absorption costing
Variable costing
Direct materials
Direct labor
Variable manufacturing overhead
Fixed manufacturing overhead
Total unit cost