Lavage Rapide 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 $$1,400$ per month plus $$0\mathrm{.}08$ per car washed. The company expects

to wash $8,300$ cars in August and to collect an average of $$6\mathrm{.}20$ per car washed. The company actually

washed $8,400$ 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.