Hello, I'm trying to use the new calculations features and running into trouble.

I have a form with a number of different products with separate quantity fields. I'm trying to calculate a sub-total which I'll then use to calculate surcharges. I figured this would be a matter of creating a Number field who's value is the sum of all the products of each quantity and each price...e.g.

Sub-Total (number) =

Price1 x Quantity1 + Price2 x Quantity2 etc.

The number always came up zero. I decided to simplify things and check each part and found that:

Sub-Total (number) = Quantity1

always returned zero no matter what Quantity1 actually was. Has anyone else had this problem? Am I doing this incorrectly?

Just to recap:

- I create a Number field

-I enable Calculation

-I choose an arbitrary Quantity field from the "Insert Merge Tags" drop down

-I save and view the form

-I punch in a number for the Quantity

-The Number field does not update

-If I set the Number field to the Price, however, it does reflect it, but that never changes anyway.

Help is appreciated!