Explanation:
so, how many miles will we have to drive in total ?
22 miles twice a day (back and forth), 5 days a week.
that is
22×2×5 = 220 miles a week.
with 25 miles a gallon that is
220/25 = 8.8 gallons a week
that will cost with $2.78 per gallon
2.78 × 8.8 = 24.464 ≈ $24.46 per week