American Arabia Company makes cotton rolls as raw material for various cotton products. The following data on cotton rolls and costs is available:

Month	Cotton rolls	Cost
January	2	$1,500
February	8	$3,500
March	4	$2,250
April	5	$2,500
May	6	$3,000
June	3	$2,250

Required: Using the high-low method, estimate the total cost for 10 cotton rolls.