Hello, dear, you can use the following methods to calculate the profit and cost. 1. Cost: 1. Fixed cost/month (that is, fixed monthly expenditure), for example; Rent, personnel salary, tax and depreciation allocation. 2. Variable cost water and electricity. Raw materials (oil and salt are subdivided into each dish. 2. Turnover/(daily)/month. 3. Gross profit rate per unit% = selling price-raw material cost. 4. Break-even point = turnover-(fixed cost+variable cost) * gross profit rate% for example; The operating income of the day is 1111 yuan-variable cost 511 yuan = gross profit margin of 111%. Fixed expenses; 12,111 yuan/month =411 yuan net profit =1111 yuan -511 yuan -411 yuan =111 yuan =11% break-even point = daily operating income must be controlled at 111% above 911 yuan to break-even point. Of course, it is necessary to make detailed calculations. Bookkeeping is just keeping a running account, just like a notebook. You should be careful and detailed (it is best to buy an account book), and remember cash receipts and payments. If you don't bother and know how to keep accounts, then I suggest you buy an account book (three-column) and make your own account book.