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I couldn't open the website you shared. I assume you are talking about this form:
I investigated on how to update inventory widgets value but the widget inout field can't be reached from outside of the widget. Hence, unfortunately, I can't suggest you a way to calculate total ticket amount from inventory widgets.
Please keep in mind that your form won't hold information from previous submissions without widgets like inventory or quantity gift registry.
I will work on getting total amount for this situation and turn back to you if I could find a solution.
Thank you very much.
I have investigated your form further. You can calculate total ticket amount by inserting a condition to sum up the inventory widget values to be subtracted from a field. First you need to add a filed that calculates the total:
Here is the condition for your inventory widgets:
In this condition I assumed you have 200 tickets at total. Please update necessary fields.
You can clone my version of your form and investigate it:
Here is how you can clone your form:
I hope this answer helps. If you have further queries please contact us again.