The lopez family had dinner at their favorite restaurant. a 6% sales tax was added to their bill. amy paid the bill with a $15 gift certificate plus $52.90. how much did the family's dinner cost before tax? round your answer to the nearest penny.

hint: use the equation p + rp = t,
where p is the price before tax, r is the sales tax rate, and t is the total price, including tax.
$ 63.83
$ 62.83
$ 64.06
$ 70.97