Jenna walked to the
 store in 15.4 minutes. She
 bought Band-Aids for
 $0.55, gauze for $1.29,
 and suntan lotion for
 $2.89. She gave the
 clerk a $10 bill. She left
 the store at 3:45 a.m. It
 took her 18.4 minutes to
 walk home. How much
 longer did it take her to
 walk home than it took
 to walk to the store?