Auto Lavage is a Canadian company that owns and operates a large automatic carwash facility near Quebec. The following table

provides data concerning the company's expected costs:

For example, electricity costs are $$2,700$ per month plus $$0\mathrm{.}20$ per car washed. The company expects to wash $9,200$ cars in October

and to collect an average of $$7\mathrm{.}10$ per car washed.

Auto Lavage's actual level of activity was $9,300$ cars. The actual revenues and expenses for October are given below: