UNDATED (WKZO) -- The cost of gas tank continues to rise.  The latest Lundberg Survey shows motorists are paying 20-cents more per gallon than they did two weeks ago.  Gas prices have gone up more than 53-cents in the past nine weeks. Trilby Lundberg says she thinks she can see a light at the end of the tunnel, adding that the latest increase hides a drop in wholesale prices over the last few days.