In this episode Tony tells Janice that he has just put their mother's house on the market. In season one, the house had already been sold.
Whenever the mobsters in the Sopranos pay they almost always take a wad of cash out of their pocket and pull off the top 3-4 bills and hand it over. If Tony is paying for a pizza he pulls off 3-4 bills. If he's bribing someone he pulls off 3-4 bills. No matter what the amount is for that particular situation, it's always covered with the top 3-4 bills of the cash wad.