Filling up at the pump hasn't become any easier on the pocketbook of Chillicothe citizens since we last updated you on gas prices. In Monday's edition (Jan. 28), gas prices were reported at $3.12 per gallon of regular unleaded. The very next day, prices went up another $0.07, to $3.19 per gallon. This morning (Thursday, Jan. 31), gas prices were up to $3.27 per gallon — another increase; this time, of $0.08. It has been 13 days since Chillicothe gas prices were $2.93 per gallon (back on Friday, Jan. 18). Those $0.34 equate to an increase of approximately $0.026 per gallon of gasoline per day in said span.