certification CSWP answers allowable variance?

Hello all

I'm currently working on the CSWP practice exam (see Attached) and after reviewing the numbers and my dimensions i notice all answers are off by about +15 grams. 

Could this be related to my version of SW?

Does the test allow for any variance in the answers?

Attached is my model with configurations of all the questions. Below is a chart of my answers minus test answers.

    

14222.7014207.34+15.36
16506.5916490.45+16.14
15115.6615100.47+15.19
13226.7113206.40+20.31
14228.0314208.00+20.03
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