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 $$1,300$ per month plus $$0\mathrm{.}05$ per car washed. The company expects to wash $8,400$ cars in

August and to collect an average of $$6\mathrm{.}80$ 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$).$