I passed the FE exam and am selling the FE Application card (like new with manual)for the HP48GX/SX calculator for $85 at www.half.com (do a search for chotkeh). This is a ebay company.
It can save time on calculation problems. Equations are pre-programmed and it will solve for the missing varible(s). You still have to know what you are doing and which equations to use for the problem, but the card has the equations grouped for quick access.