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 companys costs:

	Fixed Cost per Month	Cost per Car Washed
Cleaning supplies		$ 0.60
Electricity	$ 1,000	$ 0.08
Maintenance		$ 0.25
Wages and salaries	$ 4,200	$ 0.40
Depreciation	$ 8,300
Rent	$ 2,000
Administrative expenses	$ 1,400	$ 0.02

For example, electricity costs should be $1,000 per month plus $0.08 per car washed. The company expects to wash 8,000 cars in August and to collect an average of $6.10 per car washed. The company actually washed 8,100 cars in August.

Required:

Calculate the company's activity variances for August.