Requirement 2: Revise the data in your worksheet to reflect the results for the subsequent period as shown below: b-1. What is the labor efficiency variance? (Indicate the effect of each variance by selecting "F" for favorable, " U " for unfavorable, and "None" for no effect (i.e., zero variance)). b-2. What is the labor rate variance? (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 final answer to nearest whole dollar amount.)