Energy Solutions Corporation estimates the cost of its physical inventory at November 30 for use in an interim financial statement. Management uses a gross profit rate on sales of 40%. The following information is available:

Inventory, November 1	$500,000
Purchases during November	$650,000
Sales during November	$900,000

The estimated cost of inventory at November 30 is

$360,000

$540,000

$610,000

$650,000