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

$\backslash$table$[[,\backslash$table$[[$Fixed$],[$Cost per$],[$Month$]],\backslash$table$[[$Cost per$],[$Car Washed$]]],[$Cleaning supplies,$$1,200,$$$0\mathrm{.}60$