Katharine Paljug is a financial writer and editor with over a decade of industry experience. Her writing has covered nearly every aspect of the financial world, from investing in forex to paying ...

This time, it's $1,007, which means that the marginal revenue of that 101st camera is just $7. Here's what it looks like written out as a formula: (Total Revenue - Original Revenue) / Additional ...

Marginal cost is the cost of producing one more unit of something. A firm is maximizing profit when marginal cost equals marginal revenue—when ... such as average cost and fixed cost.

Marginal tax rate is the percentage you pay in taxes on the last dollar you earn, while effective tax rate is the average tax rate ... amount you owe the Internal Revenue Service (IRS) in taxes ...