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 $$1,100$ per month plus $$0\mathrm{.}07$ per car washed. The company expects to wash

$8,400$ cars in August and to collect an average of $$6\mathrm{.}30$ per car washed. The company actually washed $8,500$ 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.$)$