Sаles Cоmmissiоn (Pаrt 3): We аre using the same graduated cоmmission scale as was given in Sales Commission (Part 1): If total sales is over— but not over— the commission is: $0 $5,000 2% of the amount over $0 $5,000 $10,000 $100 plus 4% of the amount over $5,000 $10,000 $20,000 $300 plus 5% of the amount over $10,000 $20,000 no limit $800 plus 6% of the amount over $20,000 What if a sales-rep earned $425 in commission. How much were the total sales to earn that commission?