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

	Fixed Cost per Month			Cost per Car Washed
Cleaning supplies				$	0.70
Electricity	$	1,100		$	0.08
Maintenance				$	0.10
Wages and salaries	$	4,600		$	0.40
Depreciation	$	8,400
Rent	$	1,900
Administrative expenses	$	1,600		$	0.04

For example, electricity costs are $1,100 per month plus $0.08 per car washed. The company expects to wash 8,400 cars in August and to collect an average of $6.60 per car washed. The company actually washed 8,500 cars in August.

Required:

Calculate the company's activity variances for August