How can I have ERPnext automatically calculate the sales partner’s commission based on monthly totals (total units in my case, though maybe total money for some other partners in the future)?
1-9 units in a month: $300 each
10-19 units in a month: $400 each (all commissions are increased to $400)
20+ units in a month: $500 each (all commissions are increased to $500)
I saw this possibility mentioned here, but not explained in any detail: Comissions