The whole point of breaking the results down by class is that your statement of "Men got 1.8x as many callbacks as women", while true, is very misleading, because the sex difference only benefitted upper class men. Lower class men got the fewest callbacks of any group.
It's equally wrong to say that it's about class and not gender, because the class difference only benefited upper class men. Upper class women did not get a statistically significant number more callbacks than lower class applicants.
Again, I'm responding to a comment that called the gender discrimination a "rounding error." It clearly is not--there is both gender and class discrimination happening and upper class women aren't better positioned than lower class applicants.
