The following labor standards have been established for a particular product: The following data pertain to operations concerning the product for the last month: Required: a. What is the labor rate variance for the month? (Input the amount as a positive value. Leave no cells blank - be certain to enter "0" wherever required. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance.) b. What is the labor efficiency variance for the month? (Input the amount as a positive value. Leave no cells blank - be certain to enter "O" wherever required. Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., zero variance.)