Could someone please!!! help me to set up a complex formula which I will use
many times over.

I have an amount - say $7,417. I need to take 66.7% of the first $2,500
(which comes to $1,667.50). This leaves me with $4,917 of the original
amount and I need to take 50% of the next $3,500 ($1,750) - leaving me with
$1,417 of the original number which I need to take 40% of ($566.80) Then, I
add all the percentages up to come to $3,984.30. I have to do this a lot and
could certainly use an easier way other than a calculator and a large sheet
of paper. Thanks.