I know you've been asked about this a few times before (over the last year) and have responded that you were going to add that feature (in the last update I thought). If it got added I can't find any documentation on how it works, if not, it would be very helpful to add it.
It can take me up to an hour to do dkp after raid, because I have to figure out how much 50% of their total dkp is (for each item they received). So if they had 100 dkp before raid, and they received 3 items (boss drops), they would be charged 50 dkp for the first, 25 for the second, and 12.5 for the third. The problem is that its not 100, its an odd number like 87.215 (all fractions) and I have to sit their with a calculator after each raid. Please help by adding away to do it with the add on, I don't want to burn out.
Also, we do charge a "day" dkp (usually 16 dkp) for non boss or off spec drops so its not all 50% in on every item. So we would need a way to add a number value as well (like it is now).
Finally, if the grss add-on could update everyones dkp in raid as they receive drops it would be huge. In Naxx we can have as many as 60 drops. If several people, receive several items, then I have to do the math for all of them right on the spot so I can figure out who has the most dkp for the next item that drops. Its a nightmare, and very prone to mistakes. It also brings the raid to a screeching halt.