Jordan Industries produced 6,000 units of product that required 1.5 standard hours per unit. The standard variable overhead cost per unit is $2.75 per hour. The actual variable factory overhead was $29,000. Determine the variable factory overhead controllable variance.

a. $4,250 favorable

b. $4,250 unfavorable

c. $20,000 favorable

d. $20,000 unfavorable

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