Sscalculation
From SmartWiki
Sscalculation is a variable syntax for:
This works similar to sslogic but will do calculations based on the formula you provide. It works as follows:
<!--@sscalculation(@field@*0.05)-->
This will return the computed value of @field@*0.05 and replaces the sscalculation tag.
This way you can do calculations right on the web page views without having to use javascript which solves the problem on PDF and javascript.
This method uses MySQL syntax, so you can do any MySQL functions like concat(...), format(...), round(...), etc.