Christine Corporation manufactures baseball uniforms and uses budgeted machine-hours to allocate variable manufacturing overhead. The following information pertains to the company's manufacturing overhead data: Budgeted output units is 10,000 units; Budgeted machine-hourswas 15,000 hours; Budgeted variable manufacturing overhead costs for 20,000 units is $180,000. Actual output units produced was 9,000 units, Actual machine-hours used was14,000 hours and Actual variable manufacturing overhead costs was $171,000. What is the flexible-budget variance for variable manufacturing overhead?

A. $9,000 favorable

B. $9,000 unfavorable

C. zero

D. None of these answers is correct.