Max Wholesaler borrowed $$6,500$ on a $6\%,120-$day note. After $45$ days, Max paid $$2,275$ on the note. Thirty days later, Max paid an additional $$1,950.$ Use ordinary interest.

a$.$ Determine the total interest using the U$.$S$.$ Rule. $($Round your intermediate bolances and interest amounts to the nearest cent. Round your final answer to the nearest cent.$)$