Answer: $3,875 Favorable
Explanation: We can compute direct labor efficiency variance by using following formula :-
Direct labor efficiency variance = standard rate ( actual hours - standard hours)
where,
standard hours = 5,500units * 0.5 hour = 2750 hours
actual hours = 3,000 hours
standard rate = $15.5
putting the values into equation we get :-
Direct labor efficiency variance = $15.5 ( 3,000 - 2750)
= $3,875 Favorable