Cost of BRSCC OSS Rounds and 750 MC Bikesport Rounds

[Sigmamark7]

I have checked the websites without success, so can anyone advise what the costs of the BRSCC OSS Triple Header Rounds and the 750 MC Bikesport Double Header Rounds are for 2016? I'm trying to fill up my racing season, so am looking at adding rounds from either or both series to fill in the big gaps between the April and August rounds and August and October rounds of the Castle Combe Sports Racing Series.
I have to earn the money to pay for my racing and consequently don't have unlimited funds, so the cost of additional club memberships could also make a difference.

[Sigmamark7]

Thanks Josh.