U.S. prices at the pump slid by 3.5 cents over the past week, hitting a national average of $3.44 per gallon on Monday and down 37.2 cents from a year ago, according to GasBuddy, as oil prices reel from three consecutive weeks of declines. The national average price per gallon at the U.S. pump is now down 5.6 cents from a month ago, with diesel prices also falling 2.3 cents last week and now resting at 39 cents lower than a year ago. “With oil prices plummeting due to new concerns over the U.S. economy after a poor jobs report,…