The document discusses break even analysis, which is used to calculate the sales volume needed for a company to earn a profit. It defines break even point as the sales level where total revenue equals total costs. The document provides the formula for calculating break even point using fixed costs, price per unit, and variable costs. An example calculation is shown using hypothetical fixed costs of $1,000 and a product price of $100 that yields a break even point of 20 units. Uses and limitations of break even analysis are also summarized.