Taylor Cane's company gives their executives company cars. She is considering two options for vehicle leases. Car A has an annual lease price of $4800, with an allowance of 11,000 miles and a charge of $.11 for every mile over the allowance. Car B has an annual lease price of $5500, with an allowance of 18,000 miles and charge of $.15 for every mile over the allowance. At what volume in number of miles would the two cars have the same annual costs?