Zn, Mn, Cu, Alone

[fitos100]

I have three bags,
one with Zinc 15% EDTA chelated
one with Cu 15%EDTA chelated and
one with Mn 13% EDTA chelated.

I want to add some more Zinc in my tank but I don't find in the calculator anything to help me.
Can anyone tell me how I can calculate theses elements if I need them????