KPIX CBS News Sunday Morning March 25, 2012
>> reporter: call it cash, dough, bucks or greenbacks-- some say paper money is going away the way of news prints. >> $100 notes have almost disappeared. $50 notes and $20 notes are on the way out. >> reporter: pennies and nickels may not fare much better but leaves us with a big question. what will we fill our wall lets with? do we need them anymore or will our phone do it all? going cashless later on sunday morning. >> mason: this is a test could be the motto for one all american town we know of. it's a proving ground for new products of every sort. this morning, tracy smith will b...