Lavage Rapide is a Canadian company that owns and operates a large automatic car wash facility near Montreal. The following table provides estimates concerning the company$$s costs:

Fixed Cost per Month Cost per Car Washed

Cleaning supplies $ $0\mathrm{.}80$

Electricity $ $1,100$ $ $0\mathrm{.}08$

Maintenance $ $0\mathrm{.}15$

Wages and salaries $ $4,200$ $ $0\mathrm{.}20$

Depreciation $ $8,300$

Rent $ $1,800$

Administrative expenses $ $1,500$ $ $0\mathrm{.}05$

For example, electricity costs should be $$1,100$ per month plus $$0\mathrm{.}08$ per car washed. The company actually washed $8,300$ cars in August and collected an average of $$6\mathrm{.}60$ per car washed.