The national average price for a gallon of gas in the United States, mirroring crude oil prices, has risen at the fastest seasonal rate since 2012, AAA said. AAA reports a national average retail price for a gallon of regular unleaded gasoline at $2.60 for Friday, the first day of May. That’s up two cents, or three quarters of a percent, from Thursday and 57 cents, or 28 percent, higher than in late January. AAA spokesman Avery Ash said that, while it’s normal for gasoline prices to climb as summer approaches, the rate of increase is faster than in the past. The national average price for Friday is the highest since Dec. 12 and […]