Hi and welcome to the forum!

I don't understand what your fourth combinator is for. You can already do this with one combinator.

Also, you could use a constant combinator with -2000 coal and -3000 iron and feed it & your storage amount into a decider combinator with the condition "each > 0 ...

TL;DR
I would like to be able to perform "AND" and "OR" operations in one combinator


What ?
Instead of having to use three decider combinators + an arithmetic combinator and 3 circuit signals to determine if there are, for example more than 2000 coal and 3000 iron in a network, I would like ...