Which is best to buy

A (16 ounces of hand soap for $2.40

B (20 ounces of hand soap for $2.80

C (24 ounces of hand soup for $3.00

D (12 ounces of hand soup for $2.00

So assuming you want the most units of stuff for the smasllest units of cost

make into fractions and simplify

money per unit of stuff

cost per unit

so we do

A. 16 oz for 2.40

2.4/16=0.15/1

B. 20 oz for 2.80

2.8/20=0.14

C. 24 oz foe 3

3/24=0.125

D. 12 for 2

2/12=0.167

find smallest cost per unnit

answe ris 0.125

answer is C. 24 oz for 3 dollar