Cost projection

I am estimating the overall price of our project in Dgraph, could anyone please answer?

Do we have a cost projection of Dgraph for the Customer / Product dataset?
If I have Customer/Product records then how much memory will it take roughly to execute 1 Million customer events, 10 Millions or 100 Millions.

I can see cost projection in Dgraph pricing, please suggest some approximate memory uses.

Dgraph version : 23.0.1