I’m looking around for an open source shopping cart / Invoicing option, primarily for wholesale.
Ideally it would allow customers to buy online as with any online shop but also allow admin side manual addition of orders too.
Customers would/could have unique prices.
Is InvoicePlane able to figure in this idea ?
I’m not sure if IP is really a good choice here.
I recommend you using one of the many eCommerce open source software out there.
For example, Magento or Prestashop.
They all have customer groups, where you can apply special discounts.
And all of them have an default invoice system build in