Venture risk management, like general financial preparation, is only known by your own internal decision-making, and I think all aspects of revenue and expenditure items are only known by the landlord himself. Unless you write it for someone, or you sell it from a company and want to keep an account. If you don't understand, just be an ordinary stall. Revenue, cost and profit are equal to. A three-year (three-day) plan. I hope I can help you, thank you