For example, electricity costs should be $1,200 per month plus $0,15 per car washed. The company expects to wash 9,000 cars in August and to collect an average of $4.90 per car washed. The company actually washed 8,800 cars in August. Required: Calculate the company's activity variances for August. (indicate the effect of each variance by selecting "F" for favorable, "U"if for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.)