The amount of money many companies spend is in many ways directly proportionate to how much they produce. That is, there are a lot of variable costs that come with running a company. These costs are ...

Every business has operating expenses — that is, the costs of running the business. These expenses can generally be classified in two ways: Fixed expenses and variable expenses. Understanding the ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Covariance indicates the relationship ...

Learn what flow and stock variables mean in simple terms. Understand how income, wealth, GDP, and debt connect through time and why this matters in economics and everyday life.

As you work to create a budget, it’s important to understand how fixed and variable expenses will impact your bottom line. David McMillin writes about credit cards, mortgages, banking, taxes and ...