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Question: Solver, with sigma and varing amoung of lists

I am busy writing ANOVA functions in my solver, they require the sigma function but also depend on a varing amoung of samples (lists), is there a way that i could soecify a varying amount of lists to be used in the calculations?

e.g.
Sigma(i:1:#samples:1:item(sample(i):1)) (Summing the 1st value of all the lists named sample1, sample2 etc)