Simple Formulas

Since setting up this account everything seems to be great. That is until I try to do a �formula� in the �forms� field. It seems like it should be fairly easy. The instruction area for this seems to be very vague, or I�m real slow. Don�t know which.
I�m trying to get two simple fields to do a simple math calculation and not getting anything to work. My fields are �Size� and �Entry Price� This is what I have tried in the formula field:
(
type = formula
value = Size * Entry Price
)

Help with the basics.