Contemporary Mathematics for Business & Consumers 8th Edition by Robert Brechner,Geroge Bergeman

Exercise 108

Set up and solve equations for the following business situations.
Pitt's Pit Stop sold $15,496.50 worth of gasoline yesterday. Regular sold for $3.30 a gallon and premium sold for $3.45 a gallon. If the station sold 380 more gallons of regular than premium,
a. How many gallons of each type of gasoline were sold
b. If the profit on regular gas is $0.15 per gallon and on premium is $0.18 per gallon, what was the station's total profit