Missourians weary from the onslaught of rising gasoline prices could see some light at the end of the tunnel. Mike Right with Triple A Missouri says gas prices are a product of supply and demand. And he says the supply situation is about to get better with current oil inventories way above those of a year ago and some Gulf Coast refineries shut down by last year’s hurricanes about to come back on line. Right says we could see gas prices drop by as much as 30 cents a gallon over the next month, hopefully in time for summer vacations.