Answer:
She owes $63.06 in sales tax.
Explanation:
Cost of Lamps =
23.59*3= $70.77
Sofa = $769.99
Add them
769.99+70.77
=840.76
Percentage
7.5/100 *840.76
= 63.057
She owes $63.057 to sales tax
If you need to round the answer of $63.057, it would be rounded to $63.06.