Given
3-kilogram bag of lollipops for $10.50
5-kilogram bag of lollipops for $18.67
2-kilogram bag of lollipops for $9.22
4-kilogram bag of lollipops for $12.64
Required
we need to find which among these is the best buy.
Explanation
For 3-kilogram bag for $10.50
[tex]\text{ cost of 1 kg bag=}\frac{10.50}{3}=3.5[/tex]For 5-kilogram bag of lollipops for $18.67
[tex]\text{ cost of 1 Kg bag=}\frac{18.67}{5}=3.73[/tex]for 2-kilogram bag of lollipops for $9.22
[tex]\text{ cost of 1 Kg bag=}\frac{9.22}{2}=4.61[/tex]for 4-kilogram bag of lollipops for $12.64
[tex]\text{ cost of 1 Kg bag =}\frac{12.64}{4}=3.16[/tex]Here the minimum cost per kg is for 4-kilogram bag of lollipops for $12.64. So it is the best buy.
