In Testing a Hybrid Engine, Various Mixtures of Gasoline and Methanol

Essay

In testing a hybrid engine, various mixtures of gasoline and methanol are being tried. How much of a 90%-gasoline mixture and how much of an 80%-gasoline mixture would be needed to make 260 gal of an 85%-gasoline mixture?
Amount of 90%-gasoline mixture: __________ gal
Amount of 80%-gasoline mixture: __________ gal