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 $1,500 per month plus $0.08 per car washed. The company expects to wash 8,000 cars in August and to collect an average of $6.80 per car washed. The company actually washed 8,100 cars in August. Required: Calculate the company's activity variances for August. Note: 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