Which Formula Should Use To Classify The Values

I would like to classify the chemical data into 16 groups based on their value. how to construct a formula to do the job?

My data look like this:

A B C D E F G
AsSbAgNiGroupcondition
0.10.50.080.6 14 1If As <0.1, Sb<0.1 , Ag<0.1 , Ni<0.1
2If As >=0.1, Sb<0.1 , Ag<0.1 , Ni<0.1
3If As <0.1, Sb>=0.1 , Ag<0.1 , Ni<0.1
4If As <0.1, Sb<0.1 , Ag>=0.1 , Ni<0.1
5If As <0.1, Sb<0.1 , Ag<0.1 , Ni>=0.1
6If As >=0.1, Sb>=0.1 , Ag<0.1 , Ni<0.1

[code]....