As of Monday average retail gasoline prices in Kansas have fallen 3.1 cents per gallon in the past week, averaging $2.62 per gallon yesterday, According to GasBuddy’s daily survey of 1,329 gas outlets in Kansas.This compares with the national average that has fallen 3.0 cents per gallon in the last week to $2.73, according to gasoline price website GasBuddy.com. Including the change in gas prices in Kansas during the past week, prices yesterday were 70.3 cents per gallon lower than the same day one year ago and are 2.4 cents per gallon higher than a month ago. Over the past week we seen an increase of 10 cents per gallon in Great Bend.