LVN Corporation's direct labor costs and related information for the month of June were as follows: Actual total direct labor-hours 1,500 Standard total direct labor-hours 1,200 Total direct labor cost $16,300 Unfavorable direct labor rate (rate) variance $600 What is LVN Corporation's direct labor efficiency variance? (Round any intermediary calculations to the nearest cent and your final answer to the nearest dollar.) O A. $4,075 unfavorable B. $3,141 favorable O C. $3,141 unfavorable D. $4,075 favorable