The following labor standards have been established for a particular product: Standard labor-hours per unit of output ........ Standard labor rate ......... 1.5 hours $17.55 per hour The following data pertain to operations concerning the product for the last month: Actual hours worked ......... Actual total labor cost Actual output......... 5,300 hours $94.340 3,600 units What is the labor rate variance for the month? $1,325 U $1,780 F $430 F $430 U