The Changs updated their bedroom by purchasing a new lamp for $89.95 and a comforter set for $239.99. They paid 2007-03-04-00-00_files/i0120000.jpg% sales tax on their purchases. If the Changs paid $351.72 total, determine if they paid the correct amount. a. The Changs family paid $0.33 too much for their purchases. b. The Changs family paid $0.99 too much for their purchases. c. The Changs family paid $5.94 too much for their purchases. d. The Changs family paid the correct amount for their purchases

In order to determine the correct answer, we need to confirm it first by making the solution below:
Costs: $89.95 = New Lamp
            $239.99 = Comforter
            6 3/5% = Sales Tax (convert this to decimal and we get 6.6%)
            $351.72 = Total amount the Chang's paid
Let's get the total costs first which is $329.94
6.6% of 329.94 is $21.78
The total cost with the tax would be $351.72.
Therefore, the Chang's paid the correct amount. The correct answer would be option D. The Chang's family paid the correct amount for their purchases.