Lavage Rapide is a Canadian company that owns and operates a large automatic car wash facility near Montreal. The foliowing table provides estimates conceming the company's costs: For example, electricity costs should be $1,500 per month plus $0.06 per car washed. The company expects to wash 8,000 cars in August and to collect an average of $6.80 per car washed. The company actually washed 8,100 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.)