Breakeven analysis examines the relationship between costs, revenue, output levels, and profit. It looks at how changes in sales volume impact total sales revenue, expenses, and net profit in the short run. The breakeven point is the level of sales or output where total revenue equals total costs, resulting in no profit or loss. Margin of safety is a measure of the difference between budgeted sales and breakeven sales, showing how much sales can decrease before losses are incurred. Breakeven analysis is used for short-term decision making such as pricing, product mix, and whether to accept special orders.