(Reuters) – The United States Postal Service (USPS) on Wednesday filed notice of price change with the Postal Regulatory Commission that includes a two-cent increase in the price of a first-class mail forever stamp from 58 cents to 60 cents. The proposed hike in prices comes ahead of President Joe Biden’s announcement for an about $50 billion financial relief over a decade to the USPS. The proposal would raise prices of first-class mail, an affordable way to send envelopes and lightweight packages, by about 6.5%, USPS said. If the price hike goes through, the single-piece letter additional oun…