Showing only the new gained amount of subs per month

is it possible to ask nightbot to calculate an amount of new subs from a static number. for instance the month starts at 1000 subs and the command only shows " x has gained 70 new subs" ?

What you want to do is not possible with base nightbot, it would have to be done with a customapi of some sort, but i don’t know of any that do such a thing.