Can I have a user place multiple orders and pay for them all together?

We use JotForm for our school online lunch ordering.  Some families have multiple children that they order for.  Currently they do one order and payment transaction for each child but I'm wondering if we could have them place 3 separate orders and pay in one transaction?

Is this the form in question? http://www.jotformpro.com/form/80165739477973 

If you would like to let the user choose a product multiple times in a single submission, then you could add the quantity option to each product: https://www.jotform.com/help/225-How-to-Add-Options-to-Payment-Forms 

Let us know if you need more help.