The standard hours for direct labor is 0.50 per unit. The standard cost per hour is $48. The company manufactured 2,550 products, and spent $25,811 for the 974 actual hours. Required: Calculate the direct labor rate, efficiency, and spending variances. Note: Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance). Round your intermediate calculations to 2 decimal places.