Well, they say they keep 0.25% in fees so I just got the volume for some days and sorted that out that number
Well yes and remember there are too sides of every trade.
Buyers pays .25% and the seller does. So it's safe to use .5% of their volume. At this moment it's 32M
Source:
http://coinmarketcap.com/exchanges/poloniex/Which means 32.308.513. Which means
Half of 1 % of 323085,13 = 160000 +