Answer :
She paid 10% tax and 15% tip in addition to the $60. Therefore the total will be:
$60 + $60(0.10) + $60(0.15)
= $60 + $6 + $9
= $75
$60 + $60(0.10) + $60(0.15)
= $60 + $6 + $9
= $75