Becky Company produces high-quality leather boots. The company has a standard cost system and has set the following standards for materials and labor: Leather (12 strips @ $20) $240 Direct labor (10 hours @ $10) $100 Total prime cost $360 During the year, Becky produced 160 boots. Actual leather purchased was 1,700 strips at $16 per strip. There were no beginning or ending inventories of leather. Actual direct labor was 1,800 hours at $14 per hour. Calculate the labor rate variance. $7,200 U $7,200 F $6,400 F $6,400 U