A substantial portion of inventory owned by Prentiss Sporting Goods was recently destroyed when the roof collapsed during a rainstorm. Prentiss also lost some of its accounting records. Prentiss must estimate the loss from the storm for insurance reporting and financial statement purposes. Prentiss uses the periodic inventory system. The following accounting information was recovered from the damaged records. Beginning inventory $ 60,000 Purchases to date of storm 190,000 Sales to date of storm 250,000

a.	Gross margin
b.	Cost of goods sold
c.	Estimated ending inventory
d.	Inventory lost