Exercise $8-16$A $($Static$)$ Calculating the variable overhead variance LO $8-4,8-5,8-6$

Cheney Company established a predetermined variable overhead cost rate at $$21\mathrm{.}00$ per direct labor hour. The actual variable overhead cost rate was $$19\mathrm{.}20$ per hour. The planned level of labor activity was $76,000$ hours of labor. The company actually used $80,000$ hours of labor.

Required

a$.$ Determine the total flexible budget variable overhead cost variance and indicate the effect of the variance by selecting favorable $($F$)$ or unfavorable $($U$).$

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