where can I keep up the amount of specific products sold?

where can I keep up the amount of specific products sold? 

Hi there,

Please help us understand your question by providing a bit more information. Kindly detail what you're trying to achieve.

Looking forward to your reply.

I've been receiving online food order for takeaway on our form, as a sort of webshop. They can for example order lasagne and meatballs. 

They have to indicate how many lasagnes thay want to buy. 

I would like to keep up with the total amount of lasagnes sold, but this doesn't seem to work. 

(hoeveelheid means quantity). 

Sow I would like to see the total quantity for each product. 

Greetings and thank you for clarification.

Unfortunately, this is not possible using Payment integration. To make this possible, you can use the Inventory widget. You can click here to learn more about it.

If you decide to use this, you need to add a Form calculation widget to get the total price, and then change payment type from Selling products to User Defined amount.

Please let us know if you need further assistance.