Swapping US $1 bills to coins would save 5.5b over 30yrshttp://www.npr.org/blogs/thetwo-way/2011/03/04/134276189/swapping-dollar-coins-for-bills-could-save-5-5-billion-gao-says by jeffepp • 15 years ago 17 30 15 years agoNPnpr.org