please help me do the math of this

i actually suck at math, but i wanted to get some deeper inside into EV-Calculations

Following situation:

FT 24+2 Late, just before the money
blinds are 800/1600, 50? Ante, preflop pot is ~2,9k

CO (~30k)opens for 6800k, he was pretty nitty, but rather weak-tight.

I´m on the BU with 88

Now i do the following assumptions:

-he is raising ~19%
-he calls with the top 4,2% (AA-99,AK,AQs)which is ~22% of his range


If I get called i loose 69%
and win 31%

I came up with the following calculation, but i guess its wrong [img]/images/graemlins/crazy.gif[/img]

EVpush= (78*9700)+(22*31*47000)+(21*69-22000)