Including multiple mixtures in a data table

[#1]

Is there a way in JMP 16 to include multiple mixtures of variables in a data table? I have three "mixtures" that are independent of each other and the components of each total 100% of each mixture. All three mixtures are factors of the response I am investigating.

[#2]

Could you approach this case as a 'mixture of mixtures?'

[#3]

No I don't think I can do that, since each mixture is independent from one another.