Sales Commission

As per attached file I tried for find out the best result; But I failed. So, I came to you all Experts -


I want result in cell 'C12' sales commission where are the following condition required -

1. Sales up to 25,000.00; Sale Commission would be 0.20% and not less than 50.00
2. Sales from 25,000+ up to 100,000.00; Sale Commission would be 0.15%; and not less than 100.00
3. Sales from 100,000+ up to 500,000.00; Sale Commission would be 0.10%; and not less than 200.00
3. Sales 500,000.00 + ; Sales Commission would be Minimum 1000/- & Maximum 2000/-


Your help will be highly appreciated.

Regards

kmai