Breakeven analysis examines the relationship between total costs, total revenue, losses and profits over different levels of output. It determines the break-even point where total revenue equals total costs. It can use both linear and non-linear cost and revenue functions. Breakeven analysis is useful for managerial decisions like determining the margin of safety, required rate of profit, and effects of changes in price, costs, output, and fixed costs. It also analyzes operating leverage which indicates the risk level of a firm based on how fixed costs and variable costs affect profits.