SixthZ has provided the following data concerning its costs for October:

	Actual Results	Flexible Budget	Planned Budget
Revenues	$19,000	$22,000	$17,000
Wages and Salaries	$11,000	$15,000	$9,000
Board Materials	$9,000	$10,000	$8,500
Administrative Expenses	$2,750	$3,200	$2,600

Calculate the Activity Variance (or Flexible Budget Variance) with respect to Wages and Salaries in October.

Group of answer choices

$6,000F

$4,000F

$4,000U

$6,000U