How to set up multiple purchasable options with multiple quantities of like options

I'm setting up a beer delivery service and I have been setting up my order form with your site and I would like to know if there is a way to set up a system where people can buy, for example multiple 6-packs of bud light while also getting a 6-pack of Sam Adams? The way I have it currently set up is, I have grouped all the 6-packs into one category with sub categories for the different types of 6-packs, since they all don't have the same price. I want to make sure my customers can order as much as they want with out having to order multiple times. If there is a "Shopping Cart" system that you have, that would be the best way can think to do it but I have yet to come across one or find a post about one. Also the primary way people will order would be though a mobile app.

I have been checking your form and noticed you have already products to it, do note that payment integrations will allow you to add products, options and quantity selectors, you will get a sub-total and even include tax, coupons or shipping costs. 

Please take a look on the following guides that will help you setting up an order form: 

https://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form

https://www.jotform.com/help/225-How-to-Add-Options-to-Payment-Forms 

Now, if you would like something a bit complex, you will need to set up your products using basic fields and then perform the calculation on your form, the guides below will help you doing so: 

https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

https://www.jotform.com/help/301-How-to-Assign-Calculation-Value

https://www.jotform.com/help/275-How-to-Pass-a-Calculation-to-a-Payment-Field

You may also provide us more details or an example about what you would like to achieve, we will be more than happy to assist you.