[Solved] Direct antigen testing differs from direct fluorescence testing in that the results A)require an electron microscope. B)are less accurate. C)are more accurate. D)require specialized equipment. E)are read with the naked eye. Incremental Manufacturing Cost: The additional costs incurred to produce an additional unit of product, including materials, labor, and overheads. Product Costs: Product costs are the costs directly associated with the production of goods, including direct materials, direct labor, and manufacturing overhead. Period Costs: Expenses that are not directly tied to the production of goods, such as administrative and selling expenses, and are expensed in the period they are incurred. Period Costs: Expenses that are not directly tied to production activities and are expensed in the period they are incurred, such as administrative and selling expenses.