SOLUTION: The record of Mrs. Selsor�s gas purchases during a four-week period is given in the table below. What was his average cost per gallon of gasoline purchased during the four-week

Question 818465: The record of Mrs. Selsor�s gas purchases during a four-week period is given in the table
below. What was his average cost per gallon of gasoline purchased during the four-week
period? Express your answer to the nearest cent.
Week 1 Week 2 Week 3 Week 4
Price per Gallon: $2.99 $3.09 $3.29 $3.59
Number of Gallons Purchased: 18 15 12 10
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
V = 18 + 15 + 12 + 10
V = 55 gal
---
avg = 299(18/55) + 309(15/55) + 329(12/55) + 359(10/55)
avg = 319.15182 cents
---
avg = $3.19/gal
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