New York (CNN Money)  02/9/2010 (Charles Riley, staff reporter) US Airways is hiking fees on overweight and oversized baggage sizes, a spokesperson for the airline said Wednesday. For overweight bags that weight between 50 and 70 lbs., the price will increase from $50 to $90. For supersized bags that weigh in excess of 70 lbs., customers will have to pay $175. up from the previous price of $100. Those fees are in addition to the base price for checked bags, which the airline is keeping the same at $25 for the first bag, and $35 for the second. The new …