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