The following labor standards have been estoblished for a particular product: Standard labor houra por unit of output Standard labor rate 5. 20.70 por hour The following data pertain to operations concerning the product for the last month: Required: a. What is the labor rate variance for the month? b. What is the labor efficiency variance for the month? (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (i.e., z variance). Input all amounts as positive values.)