Roma's skates cost $175. Every two weeks that she skates, she spends $4.50 on sharpening the blades. One...?

Roma's skates cost $175. Every two weeks that she skates, she spends $4.50 on sharpening the blades. One year, she spent a total of $256 on the cost of skates and sharpening. Find the number of weeks she skated that year.