The changs updated their bedroom by purchasing a new lamp for $89.95 and a comforter set for $239.99. they paid 6 3/5% sales tax on their purchases. if the chang's paid $351.72 total, determine if they paid the correct amount. a. the chang's 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.