CSWP Segment 1 trouble

Hi there all,

i have done the CSWP Segment 1 simulation model, checked multiple times (quotes, equations, material, etc...) and everything seems ok, however my mass doesn't match with the correct answer and options, not even in tolerance.

Same for the exam which i failed on first attempt. What's the problem?

I'm new here, I'd like to attach my model on this post, how to?