I need help. My answer keeps saying it’s wrong

Answer:
$3970
Step-by-step explanation:
Progressive tax rates use different rates for different parts of an income. In this case, the first $9000 is taxed at 4%, the next $5000 is taxed at 5%, and everything else is taxed at 6%.
For an income of $70,000, the amount taxed at 6% is 70,000 − 14,000 = 56,000. The total income tax is therefore:
0.04 (9000) + 0.05 (5000) + 0.06 (56,000) = $3970