The price for unleaded gasoline is up 22 cents since last Monday — an average increase of more than 3 cents/gallon/day. KSPR reports that since October, gas prices in Springfield have gone up 44%. Filling a 15-gallon tank cost $37.50 6 months ago. Now the price is $53.85. The average price for a gallon right now in Springfield’s about $3.59. Last October, it was $2.50.