Pricing = cost+profit = cost × profit rate

Pricing = cost ×( 1+ profit rate) profit rate = profit/cost

Profit percentage = (selling price-cost) ÷ cost × 100% selling price = pricing percentage × discount.

Interest = principal × interest rate × number of periods, and sum of principal and interest = principal ×( 1+ interest rate × number of periods)

brief introduction

The essence of profit is the manifestation of enterprise profit and the labor achievement of all employees. Enterprises make profits by producing high-quality goods for the market. Compared with surplus value, profit is not only the same in quality, but also the same in quantity. The difference of profit is that surplus value is for variable capital, and profit is for all costs.