Investopedia / Candra Huff A marginal tax rate is the percentage of tax applied to each additional dollar of income within a specific bracket, rather than being applied to the whole income.

Fixed costs and variable costs affect the marginal cost of production only if variable costs exist. The marginal cost of production is calculated by dividing the change in the total cost by a one ...

Milan Markovic/Getty Images Vitamin B12 is needed for the development and function of nerve tissue ... Vitamin B12 deficiency is rare, but low or marginal levels are common, affecting up to ...