Word Problem $10-23($Algo$)[$LU $10-3(1)]$

Max Wholesaler borrowed $$8,000$ on a $9\%,120-$day note. After $45$ days, Max paid $$2,800$ on the note. Thirty days later, Max paid an additional $$2,400.$ Use ordinary interest.

a$.$ Determine the total interest using the U$.$S$.$ Rule.

Note: Round your intermediate balances and interest amounts to the nearest cent. Round your final answer to the nearest cent.

b$.$ Determine the ending balance due using the U$.$S$.$ Rule.

Note: Round your intermediate balances and interest amounts to the nearest cent. Round your final answer to the nearest cent.

Ending balance due