Trishs Quilt Connection is an on-line company specializing in high-quality quilt frames and accessories. Trish does not charge customers shipping charges for quilt frame orders. She has provided the following information;

Month Quilt Frames Sold Shipping Costs

January 1,075 $ 8,800

February 780 $ 8,000

March 1,150 $ 9,000

April 1,280 $10,000

Use the high-low method to determine the cost formula and calculate what Trishs total expected shipping costs would be in May if she sells 1,000 frames