Beverly Company has determined a standard variable overhead rate of $$3\mathrm{.}70$ per direct labor hour and expects to incur $0\mathrm{.}50$ labor hours per unit produced. Last month, Beverly incurred $1,550$ actual direct labor hours in the production of $3,200$ units. The company has also determined that its actual variable overhead rate is $$2\mathrm{.}40$ per direct labor hour.

Required:

Calculate the variable overhead rate and efficiency variances as well as the total amount of over$-$ or underapplied variable overhead.

Note: Indicate the effect of each variance by selecting $"$F$"$ for favorable, $"$U$"$ for unfavorable, and "None" for no effect $($i$.$e$.,$ zero variance$).$