<@U4Z7RGALE> You can't reference the results of a ...
# general
m
@suitemike You can't reference the results of a formula field in another field. You have to duplicate the formula and then add your other math to it.
( nvl({totalamount},0)-nvl({discountamount},0)-nvl({taxtotal},0)-nvl({shippingamount},0)) * 0.75