Hey,

I am trying to reference a cell from one sheet to another one with increments of 40, been trying to find a solution in the forum but got too confused.

Currently when I drag down, it increases by 1:
='Export invoices'!$C35
='Export invoices'!$C36
='Export invoices'!$C37

Ideally I would like to drag it so it follows a set pattern (+40) as such:
='Export invoices'!$C35
='Export invoices'!$C75
='Export invoices'!$C115

Thank you in advance!