How to list flat charges/discounts that are on the position, not per amount

[PhilippGoetje]

Hey,

multiple customers have asked me, how to correctly transmit the following scenario as an example for easy understanding:
A company produces small metal parts, which are individually cheap but have a one time charce associated with them, for example to procude the mold that is necessary.
Lets say they want to write an invoice with one position that includes this.
Amount: 2500 pieces
Grand single: 2,50€
One time charge: 850€

My current approach is to divide the 850€ by the 2500 pieces to get a percentage per piece and create a charge in the allowances/charges.

Is there any better approach to this? The percentages can get a bit "unconventional", if the number of pieces is very low while the one time charge is very high.

Thanks in advance!

[FrankHossfeld]

You can add charges and allowances on document level. At the end of this issues #640 you'll fond some code.

[PhilippGoetje]

This does not solve the stated example. It is not a document level charge. I want to add a fixed charge, independent of amount, on invoice line level.

[FrankHossfeld]

As long as the invoice has only one position, it should make no different. Have you tried setTotalAmount?

[PhilippGoetje]

Addendum:
It appears that my initial example was not extensive enough, sorry about that. Below you find a more extensive example.

An invoice shall have three positions.
Pos 1:
2500 items, 2,50€ each, 850€ single fixed charge for mold-manufacturing and for the whole position a 12% allowance plus a 5% material surcharge.
Pos 2:
60 m, 500€ each, no fixed charge and for the whole position 5% material surcharge
Pos 3:
500 items, 36€ each, 450€ single fixed charge for load bearing calculation and for the whole position a 5% allowance

So, my question in this case is, what is the best way to submit the information to mustang and/or how is it intended in the Zugferd standard in general.
Is is recommended to do:
A - convert the single fixed charge per position into a percent based charge per amount and treat as normal allowance/charge?
B - calculate the whole invoice line beforehand and submit as setTotalAmount? (Please specify the correct way of calculation including tax, if applicable)
C - mandatory split into separate positions, with all the drawback that would have in the environment the invoice is generated in
D - a completely different approach?

For simplicity sake, lets not assume document wide allowances/charges, that is a separate topic.

I hope this gives a better picture of a process that is widely used in the industry and I hope it clears up the confusion of my initial post.

[FrankHossfeld]

Ok, sounds different. In this case that charges/allowance on document level is no solution for the problem. I think, solution B is the way to go. But, this is an assumption.