Formula Field Question

For starters, yes I did read the https://www.zoho.com/crm/help/customization/formula-field-examples.html

to try to help with this formula. So do not point me to that please.

I have a IF ELSE formula I struggling with.

Basically I have field called Attorney Fee showing as currency. What I need is that whatever that inputted in there should reflect an amount shown in currency for our finance option.

Here is an example:

$4500 attorney fee should show as $216.

Here is the formula I created with all the fee options:

If(Contains(${Leads.Attorney Fee}, '3500'),$168,

If(Contains(${Leads.Attorney Fee}, '4000'),$192,

If(Contains(${Leads.Attorney Fee}, '4500'),$216,

If(Contains(${Leads.Attorney Fee}, '4700'),$226,

If(Contains(${Leads.Attorney Fee}, '5200'),$250,

If(Contains(${Leads.Attorney Fee}, '5900'),$283,

If(Contains(${Leads.Attorney Fee}, '6200'),$298,

If(Contains(${Leads.Attorney Fee}, '6400'),$307,

If(Contains(${Leads.Attorney Fee}, '7900'),$379, 0 ) ) ) ) ) ) ) ) )

I am getting the following error message:

You used the wrong type of data in an argument. Check what you entered between the parentheses of your functions to make sure you put the right kind of data in the right place.

Please help me understand what I am doing wrong. I tried several things that didn't seem to work. Looks like it might be a simple fix for someone more familiar with formulas.

Thanks in advance.