1, breakeven point = fixed cost/(selling price-purchase price) This formula shows that breakeven point is determined by the difference between fixed cost and selling price and purchase price. Among them, fixed costs refer to costs that will not change in a certain period of time, such as rent and wages. The lower the break-even point, the higher the profit level of the enterprise.

2. Profit rate = (selling price-buying price)/buying price×100% This formula shows that profit rate is determined by the difference between selling price and buying price. Among them, the selling price refers to the selling price of the goods, and the purchasing price refers to the cost price of the purchased goods. The higher the profit rate, the higher the profit level of the enterprise.

3. The formula discount rate = discount/original price × 100% means that the discount rate is determined by both discount and original price. Among them, discount refers to the reduction of commodity prices, and original price refers to the original sales price of commodities. The higher the discount rate, the more concessions the enterprise gives.

The significance of the existence of formula

1. Simplify and speed up calculation: Formulas can simplify and speed up the calculation process. For example, when solving complex mathematical problems, using known formulas can avoid re-derivation and calculation, thus saving time and energy. Accuracy and reliability: Formulas are usually based on a large number of experimental and observational data and are derived through strict logic.

2. Connecting concepts and phenomena: Formulas can connect different concepts and phenomena, so that people can better understand their relationship. For example, in physics, Newton's second law, F=ma, connects the three concepts of force, mass and acceleration. Prediction and inference: Formulas can usually be used to predict and infer unknown phenomena.

3. Design and optimization: In engineering and design, formulas are often used to guide and optimize various systems and structures. For example, in architecture, mechanical formulas are used to ensure the structural stability of buildings. Communication and communication: Formula is an international language, which enables scientists and engineers to communicate effectively on a global scale.