James Manufacturing had the following information available for July: Units Sales revenue Actual Results 13,000 ? Flexible Budget Variance Flexible Budget Sales Activity Variance Master Budget ? 2,000 U $ 13,000 F ? ? ? ? Less: Variable manufacturing costs $ 87,750 $ 91,000 ? $ 105,000 Variable marketing and administrative ? $ 3,250 U ? $ 4,000 F $ 52,000 ? $ 6,000 U $ 30,000 ? Contribution margin What was James's activity variance for variable manufacturing costs? Multiple Choice $4,000 $14,000 $24,000 $34.000 E