CSWP segment 1 enquiry

Hi,

I recently tried CSWP segment 1. I did the question 2 and noticed my result was not matching the answers given. Correct answer was 1392 something and my answer was 1398.58. Material mentioned was  Aluminium 1060 alloy with numerical value of density as 2700. I am attaching the supporting pictures and my model. Please give a review. 

Thanks in advance.

SolidworksEducator / Student