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Matthew Harris Germany Local time: 08:42 Native speaker of: English PRO pts in category: 8
18 mins peer agreement (net): +1
I'm afraid this won't be much help...
Explanation: You do have some interesting abbreviations...
Acc. to Duden, WB der Abkürzungen, WKZ - Wagniskennziffer. That doesn't work - gender would be wrong in the sentence you quote.
Währungskennzeichen - currency symbol or maybe currency ID - might work, but I'm not sure because DM is mentioned in your sentence.
I was also thinking along the lines of Z = Ziel (gender would be correct), and WK might be Werbungskosten (that's the only term listed by Duden, Abkürzungen, for WK that fits even remotely into your context).
I still do think, though, that it probably is Währungskennzeichen; maybe you can figure it out from the rest of the text?