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How to calculate the cleaning cost of Yanjiao land reclamation? Does anyone know?

Yanjiao land reclamation cleaning fee: the price of general cleaning service: 3.5 yuan/㎡, starting price: 2 yuan. Fine cleaning service price: 35 yuan/person/hour, starting price is 2 yuan. The calculation method of service fee is "35 yuan/person/hour × service number × service time". Fine cleaning services are generally charged according to the number of service people and service time, and the charging method is: 35 yuan/person/hour × number of service people × service time.