Using inventory or quantity gift registry and passing info to paypal

Ok, I'm very stuck here.

I'll outline what I am trying to achieve and hopefully someone make it clear what my best option is...

I run a playgroup. Each week we go to a different location. I want families to be able to select which location and how many children and then pass this information to paypal.

My pricing is $18 per single child and $28 per family (2 or more children).

Is there a way that I can transfer the number of people from say the inventory widget (though I would prefer to use the quantity gift registry widget) for each selected location to the paypal payment widget? It can then calculate the total price depending on how many days they pick and the whether it is for one or two+families?

Many thanks,

Vicci

Unfortunately this cannot be achieved with Quantity Gift Registry widget, but it can be achieved with Inventory widget.

Inside of this guide you can find how to do it:

How to Setup a Payment Order Form with Limited Stocks

Let us know if you need further assistance.