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	$	1,500		$	0.07
Maintenance				$	0.15
Wages and salaries	$	4,100		$	0.30
Depreciation	$	8,200
Rent	$	1,900
Administrative expenses	$	1,500		$	0.04

For example, electricity costs should be $1,500 per month plus $0.07 per car washed. The company expects to wash 8,400 cars in August and to collect an average of $6.80 per car washed. The company actually washed 8,500 cars in August.

Required:

Calculate the company's activity variances for August.