I have a two-part question:
Ignoring the capital each member contributed and just going by the percentage of the membership each existing member has an interest in, if you are allocating 35% of the company to a new investor then each existing member needs to be scaled back by 35%.
That means A would get 48.75%, B would get 3.25% and C would get 13%. Add those to the new investor that has 35% and you're upto 100%. I don't see any other way of doing it if you are basing it on percentages.
This way member A would end up with less than half the company if you give away 35% of the company regardless of how much the new investor puts in.
without revenue - your capital contributed is the only means by which you could clearly base a valuation. however there are several ways to assess a member's value. i suggest reading through Dan Shapiro's thoughts here - http://www.geekwire.com/2011/wrong-answer-5050-calculating-cofounder-equity-split - for some creative rationale.
if you do have revenue - 10-15x of rev is an acceptable valuation. So $10K in rev becomes a company valued at $100K to $150K + $65K Founders + $200K investment = $365 - $415K total value. New member should get 54% - 48% in this case.