Purchase Order form with multiple line options

I'm creating a Smartsheet grid with form that will generate a purchase order. There will be an option to add 9 different lines to the PO. Each line has its own variables: Quantity, Unit, Unit Cost, and Description. I added a question "do you have additional items to add to this PO" as a column with logic to have it either go to end of form or to the next set of variables for the new line item. If I have 9 sets of variables, do I need to repeat this question 9 times? So 9 different columns with the same question - "do you have additional items to add to this PO"? so that I can create the logic to move to next item or to end of form? I was hoping I could just go back to the same question repeatedly. Maybe there is an easier way?

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