Krispy Kreme has hit a sweet spot in helping Americans during these tough times. The price of a dozen Original Glazed Doughnuts was set on Wednesday to the national gas average of $4.11. A dozen doughnuts are usually priced at $10.79. The promotion will go on til May 4, when Krispy Kreme will price-match customer orders for a dozen Original Glazed Doughnuts with the U.S. national average for a gallon of regular gasoline. “While Americans deal with the rising PPG — price per gallon — of gasoline, we’re lowering our PPOG — price per Original Glaze,” the publicly traded company’s marketing chief …