Help with forumla result when displayed

[TheCod]

Ok, this must be really simple, I have a worksheet I use at work that calculates volume proccesed hourly, and also shows a running total as you enter hourly figures into the table, my question is can you hide everything in the result cell until the figures for each hour are entered ? currently all the result cells have irrelevant numbers in them until you enter the hours figure and the formulas do there thing, I could relly do with them being blank until the relevant hours information is input?

Any help appreciated

Steve