How to calculate the security, cleaning and office expenses in the process of real estate development, how to calculate this part of the early property fees, and how to calculate it during liquidation

How to calculate the security, cleaning and office expenses in the process of real estate development, how to calculate this part of the early property fees, and how to calculate it during liquidation? Do the security and cleaning fees refer to the sales office? If it is a sales office, it is included in the sales expenses. This part of the preliminary property fee can be handled in various ways, and the property company can negotiate and sign a contract. General expenses are mainly labor costs, including wages, welfare, insurance and other expenses. Except for the management expenses and material consumption expenses of the property management company, others are taxes and profits. Mainly on these aspects. In addition, there are also start-up expenses, which are not small expenses, mainly the fixed assets and security dormitory expenses required for the early start-up of the property.