Required Chemistry freelancer for chemical teacher to help solve with explaining chemical formula of copper gluconate job

The question asked:
Using you lab results, determine the chemical formula of copper gluconate. You must show all your work not just the formula.
Copper gluconate molecular formula is: C12H22CuO14
Copper gluconate formula to get the above answer is:
Cx + Hy + Cua + Oz g/mol the x,y,a,z are the exponents that we are looking to calculate.
Molecular weight of C - 12.011 g/mol
Molecular weight of H - 1.008 g/mol
Molecular weight of O - 15.999 g/mol
Molecular weight of Cu - 63.546 g/mol
I know the answer but how do I get to the answer?

Skills & Expertise Required

Chemistry