please tell me if i calculated this correctly. thank you.

> 12. During the month of January, the standard cost of actual hours worked amounted to $25,000, the standard direct labor rate was $10 per hour and the direct labor efficiency variance amounted to $1,000 favorable. The standard hours allowed for actual production were: a. 2,500 hours (b. 2,400 hours standard 25,000 c. 10,000 hours 1000) $24,000/$10 = 2400 hrs d. 2,600 hours