150 G28 equal the network hashrate of Groestl. So you can do the math.
Actually I'm new to the mining, so I don't know how to do the maths
But anyhow I would be glad if someone could tell me how to calculate it 
But I understand that this machine will not be that profitable
If 150 G28s equal the Groestl network, then:
If Baikal sells only 150 then you may make $25 per day, assuming all GPUs are kicked off.
If Baikal sells 300, then $12.5 per day
600 = $6.25 per day
1200 = $3.125 per day and so on.
And finally, Baikal will sell thousands of these, and hence you will be lucky to make a $1.
Groestl profit will slide rapidly with the network difficult climbing up to a position which should be roughly 8 USD right now produced by quibt. and then if baikal keep producing machine, profit will continue reducing but at a much slower pace because at that time other algorithms will join in to share this difficult. so they slide down together happily.
evaluate your investment with quibt profit, for now, looks more workable.