To create a custom condition (like show/hide condition or validation) using the product information select the field that you want to have this condition and go to the “Condition” tab.

Select the product information that you want to use

Define the condition. For example, if you want to ...

To use a product attribute in a calculation go to the formula builder and click in “Add tag to formula”, a dialog will pop up

In the dialog go to the attributes section and select the attribute that you want to use

This will add the attribute in ...

You can also do conditions in your formulas using this format:

if( condition) //Price or calculation that you want to use

So for example, lets say that you have a drop down called “Subscription type” with two options “Yearly Subscription” and “Monthly Subscription”

With the annual subscription you give a 20% discount, so you will have two calculations, one with the discount and one without the discount. ...

To create a custom calculation select the field that you want to have a custom calculation and in the “Price Type” option select “Formula”

The formula builder will show up, in this formula builder you can do any arithmetical operation using fields in your form. For example if you want the price to be the “Product Price” field multiplied by the “Quantity” field ...