The costing method that treats all fixed costs as period costs is:

A) absorption costing.
B) job-order costing.
C) variable costing.
D) process costing.

Variable Costing

An accounting method that includes only variable production costs (materials, labor, and variable overhead) in the cost of goods sold, while fixed overhead costs are expensed in the period incurred.

Fixed Costs

Costs that do not vary with the level of production or sales activity, such as rent, salaries, and insurance premiums.

Period Costs

Costs that are taken directly to the income statement as expenses in the period in which they are incurred or accrued.