The following data reflect the current month’s activity for Vickers Corporation: Actual total direct labor $ 678,170 Actual hours worked 36,500 Standard labor-hours allowed for actual output (flexible budget) 35,400 Direct labor price variance $ 15,330 F Actual variable overhead $ 148,350 Standard variable overhead rate per standard direct labor-hour $ 4.10 Variable overhead is applied based on standard direct labor-hours allowed. Required: Compute the labor and variable overhead price and efficiency variances. (Indicate the effect of each variance by selecting "F" for favorable, or "U" for unfavorable. If there is no effect, do not select either option.)