Help on interpretation on analysis of sand

[Chin_Lee]

I'm looking at silica sand for a DSB and was wondering which grade of sand was better according to the following link:
http://www.targetproducts.com/catalo...s/lmsilsnd.pdf

I'm kinda confused on the difference between Cumulative Percent Passing and Individual Percent Retained if anybody can explain it to me.

I'm leaning towards the LM70 or LM125 but not sure because of my confusion. Please help me decide.
CWLee