Error in total price

[ReneNeu]

The total prices of the invoices are not yet calculated correctly. It looks like the quantities are not included.

[jjxxs]

Currently there is no "price_per_piece"-attribute for items. There is only an amount and the total price paid. So there is currently no calculation like total=quantity*price_per_piece.

I would suggest we wait for the results of the OCR/Parser to see if it's even possible for us to extract the quantity etc.

Also please note that with the mock-data prices are always generated randomly, even for the same item. This way it can happen that identical items have a different price even on the same bill.