From the site-Rules section
1)20% direct deposit bonus for all New Accounts. In order to qualify for this bonus, you must send $200 or more. 15% reload bonus always.
2)With regards to the 15% and 20% bonus. You must roll over the deposit plus the bonus 4 times for the bonus to be valid.
a) If depositing $3,000 or more, the deposit plus the bonus must be rolled over 5 times.
b) If depositing $6,000 or more, the deposit plus the bonus must be rolled over 6 times.
c) If depositing $10,000 or more, the deposit plus the bonus must be rolled over 7 times.
3)Requesting any payout before rolling over will result in forfeiting the bonus.
4)If a player receives a payout then they can not get a bonus on that amount for one month, unless they deposit more than the amount. Then the player would receive a bonus on that amount.
The site is silent on your direct question. I never reached the rollover requirement, so Ican't give you more info than that. I have seen sites that calculate all favs at -110 max and all dogs at the wager, but these are clearly spelled out. I waould assume standard rules apply, but assuming is dangerous.
BHB is very responsive, I am sure they can clarify.