Older versions of CFO
You could assign the final price if you were using a simple inline formula like this:

{12} * {14} * $Price;

And, to use complete PHP syntax it was done with “0;” and a rare assignation with “_Price” keyword.

0;
_Price = {12} * {14} * $Price;

Current version of CFO
You must do an explicit assignment, and you don’t need to indicate “0;” at the first line, so complete PHP syntax is always active by default.
We have used this way because we think is more clear and comprehensive to professional programmers, and not very complicated to non experienced.

$FinalPrice = {12} * {14} * $Price;

Read more about new variables at Price, Quantity, Value, Weight, Points…