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Hello,
Here in the Netherlands we have a deposit scheme for things such as crates for cheese, bottles for drinks or a pallet for a whole bulk of orders.
I have a webshop for a supplier who sells goods which uses such deposit-items and the deposit itself is calculated in the order price as separate items. The webshop also has many returning cliënts (it's actually a private webshop for a select group of cliënts). When an order is placed and the cliënt receives it's goods by transport it usually returns empty crates, bottles and pallets with the same transport back to the warehouse.
Now the webshop owner (my client) wants to manually add these returned deposit-items to the existing order so that these are deducted from the total invoice before sending the invoice.
Ideally this would be done by adding the item to the invoice and making the numbers a negative, but as I understand it negative numbers are not allowed in the quantity of a product on the order. I can ofcourse customize that myself for it to work, but Is there a better way to handle this?
Thank you in advance and kind regards,
Teeuwis Hillebrand
