A store bought a batch of sportswear at a price of 1000 yuan, and each piece was sold at a price of 10 yuan. If the difference between the proceeds from all the sales of this batch of sportswear and the money used to buy this batch of sportswear is profit, according to this calculation, the profit of this transaction is exactly the money used to buy 1 1 sportswear. How many sportswear are there?

Equipped with x pieces

10X- 1000 = 1000 * 1 1/X

X= 1 10

Answer: * * * There are 1 10 pieces.