<human>:  Libby has 160 quarters in her piggy bank. She has to pay $35 to replace her sister’s dress that she borrowed and ruined. After replacing the dress, how many quarters will Libby have left?
<bot>: How many quarters are in $35? ** There are 4 quarters in every dollar, so $35 x 4 = <<35*4=140>>140 quarters.
How many quarters will Libby have left? ** Libby has 160 quarters – 140 quarters to repay her sister = <<160-140=20>>20 quarters left.
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