Aiden needs 15 liters of cleaning solution. He can buy a 2-gallon jug ($4.28) a 3 gallon jug ($5.92) a 4 gallon jug ($6.56) a 7 gallon jug ($12.98). Which jug should he purchase to get at least 15 liters of cleaning solution and spend the least amount of money?

We need 15 liters

2 gallon jug 4.28*2=8.56 1 gallon=3.78, 2 gallons=7.57 liters

3 gallon jug 5.92*3=17.76 3 gallons=11.35 liters

4 gallon jug 6.56*4=26.24 4 gallons=15.14 liters

the best solution is to buy 2 times the 2 gallon jug because he will spent

8.56*2=17.12 for 4 gallons (aprox 15 liters)

instead of the 4 gallon jug which costs 26.24

7 gallon this is more expensive and he does not that much solution