BB/100 = Big Bets per hundred hands dealt.
In NL BB= 2* Big blind i.e 20 cents in this case.
Therefore for every 100 hands dealt slp is making 37*20 = 74 cents every 100 hands
As has been pointed out. This will not hold up. It will drop to 8-10 /100 for a winning player.. If you're play KJoff early it might even go negative
For a good player at 0.5/1 you can get about 4-5bb/100 in NL. (you'll see double this for limit but in Limit BB=BB).
Therefore you make about $8/100 hands.