Stacking color lens filters for aerochrome 35mm film

[crisgil24]

I'm taking a last minute trip to Yosemite and I have some aerochrome type film and I was unable to get a true yellow and orange filter to get the proper effects but I do have an 85a and 85b filter my question is if I stack these two filters will I have a true orange or something close to it? I don't fully understand how color filters work as I've never used them but #12 yellow was one of their recommendations for this film if that helps any.