The price of gasoline is declining. The national average price for a gallon of regular unleaded averaged $2.90 on Sunday, after declining 7 cents since Memorial Day weekend. Mark Jenkins, spokesman, for the Triple “A”Auto Club, said gas prices could drop another 5-10 cents if OPEC agrees to ease production cuts. In Florida prices declined 5 cents a gallon during the past week, averaging $2.76 a gallon for regular unleaded. Since peaking at $2.92 per gallon on Memorial Day weekend, gasoline has dropped a total of 16 cents.