Perez Manufacturing Company established the following standard price and cost data:

Perez planned to produce and sell $2,200$ units. Actual production and sales amounted to $2,500$ units.

Assume that the actual sales price is $$7\mathrm{.}65$ per unit and that the actual variable cost is $$4\mathrm{.}00$ per unit. The actual fixng

cost is $$2,000,$ and the actual selling and administrative costs are $$640.$

Required

a$.$&b$.$ Determine the flexible budget variances and classify the effect of each variance by selecting favorable $($F$)$ or unfavorable $($U$).$

Note: Select "None" if there is no effect $($i$.$e$.,$ zero variance$).$