Suppose that a cotton farmer in Lubbock has planted cotton in April and expecting a harvest of 100,000 lbs. of cotton at the end of September. The current cash price of cotton is 60 /lb. in the local market and the NYBOT October Cotton Futures Price is 60 /lb. The size of NYBOT October Cotton Futures is 50,000 lbs. If the farmer decides to full hedge her expected cash position using a Put option on NYBOT October Cotton Futures with SP = 60 /lb. and premium P = 3 /lb., how many Puts the farmer needs to buy?