The "unit price" refers to the "fixed comprehensive lump sum unit price", which has included all expenses for completing the project, such as value-added tax (the tax rate is%), material costs, production costs, installation costs, hardware accessories costs, equipment and tools costs, construction costs, water and electricity costs, insurance costs, board and lodging costs, transportation costs, loss costs in transportation, loading and unloading costs, inspection costs, labor wages, profits and various subsidies, first and second