85,000,000.00 WAVES/4832 BTC = 17591 Waves per BTC
I sent 1 BTC on 4/12 and have 17,648 Waves so your number is real close. However, I should have an extra 20%. When and how will the 20% bonus be applied?
This is confusing:
https://blog.wavesplatform.com/how-to-participate-in-the-waves-ico-87d04a6d043c#.13bef93rf4) Users who buy WAVES tokens on 12 April will receive
a bonus of 20%, which will be credited to their account immediately.Those who participate before the end of April (13–30 April) will receive a 10% bonus, and those who participate from 1–15 May will receive a 5% bonus.
5)
At the end of the ICO, 85 million
WAVES will be distributed proportionally to investors, including the early investor bonuses, based on the total funds collected. 15 million WAVES will be retained by the founding team for development and marketing
Is the bonus applied immediately OR after the ICO ends and how? At the end of the ICO you can't divide 85,000,000 by all the BTC sent to get Waves/BTC, and then add 20%, 10% or 5% Waves, because you will have more than 85,000,000 Waves.
Everything will go from that 85m it's just that let's say ICO just ended and you got the last deposit so final would for example with no bonus last deposit for 1 BTC = 10000 WAVES , but the one who deposited on the first day 1 BTC amount will receive 12000 WAVES.
You can't do it that way as I explained. If you wait until the end of the ICO and divide (85,000,000 Waves/Total BTC received) = Waves/BTC then you can't add on any bonus because you will have more than 85,000,000 Waves.
Lets say:
1,000 people sent 1 BTC on 4/12
250 people sent 1 BTC on 4/13
100 people sent 1 BTC on 5/11
50 people sent 1 BTC on 5/31
Total BTC = 1,400
85,000,000 Waves / 1,400 BTC = 60,714 Waves/BTC
You can not add on any bonus to 60,174 as you will end up with over 85,000,000 Waves.
If you added on each bonus you would get:60,714 x 1.2 = 72,856.8 (1,000 x 72,856.8 = 72,856,800 Waves)
60,714 x 1.1 = 66,785.4 (250 x 66,785.4 = 16,696,350 Waves)
60,714 x 1.05 = 63,749.7 ( 100 x 63,749.7 = 6,374,970 Waves)
60,714 x 50 = 3,035,700 Waves
Total Waves = 72,856,800 + 16,696,350 + 6,374,970 + 3,035,700 =
98,963,820 Waves * 
