Final answer:
The labor rate variance for March is $9,840 unfavorable.
Step-by-step explanation:
The labor rate variance for March can be calculated using the formula:
Labor Rate Variance = (Actual Hours - Standard Hours) x Standard Rate
Given that the actual number of direct labor-hours in March was 840 and the standard rate is $12 per hour, the labor rate variance can be calculated as follows:
Labor Rate Variance = (840 - 1,800) x $12 = -$9,840
Therefore, the labor rate variance for March is $9,840 unfavorable, and the correct option is A. $4,578 unfavorable.
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