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28 6 points 02:26.04 TB Problem Qu. 9-430 (Algo) The following labor standards have been established... The following labor standards have been established for a particular product: Standard labor hours per unit of output Standard labor rate The following data pertain to operations concerning the product for the last month: 7,700 hours Actual hours worked Actual total labor cost Actual output $ 137,830 a. Labor rate variance b. Labor efficiency variance 1,800 units 4.1 hours $ 17.80 per hour 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., zero variance). Input all amounts as positive values.)