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 company's costs: For example, electricity costs should be $1,000 per month plus $0.06 per car washed. The company expects to wash 8,100 cars in August and to collect an average of $6.30 per car washed. The company actually washed 8,200 cars in August. Required: Calculate the company's activity variances for August. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.)