Here's a handy little formula to add up a column or row of figures and only show the result if it's a non-zero.
I find it hard to pick out positive numbers in a whole list of values if there are a lot of zero numbers. Look at the two following examples..

if there are a whole lot of numbers in use like when you're looking at a stock list that goes on for pages and you're looking for what is left amongst a lot of zero quantity items, it's really easy to miss the numbers. But, by using the IF function of Excel you can test the normal formula and only output a result for whatever value you want. ie.
the example below uses this
Here's what it looks like:

Loads better!
Popularity: 7% [?]