I still have no clue as to how to create a formula from this problem that I have.
I am looking to create variable commission rates for differing price points. Can I get some Help?

If sales amount is equal to or less than $449 then commission is 50% of sales
If sales are greater than $449 but equal to or less than $599 then commission is 60% of sales.
If sales are greater than $599 but equal to or less than $899 then commission is 70% of sales.
If sales are greater than $899 but equal to or less than $1799 then commission is 80% of sales.
If sales are greater than $1799 then commission is 90% of sales.