Formula

Formula

Hey Team, 

I am trying to create a formula in Writer and if possible also CRM to work out after tax income for clients. The Tax rates are : 

Tax Rate
Taxable income bracket
10.5%
0 - $15,600
17.5%
$15,601 - $53,500
30%
$53,501 - $78,100
33%
$78,101 - $180,000
39%
$180,001 and over

Sadly the formulas are beyond my understanding ! 

Any help appreciated !!