A grocery store sells four different jars of peanut butter. Determine which is the best​ buy, based on the cost per unit.

10 ounces for ​$1.06 24 ounces for ​$2.45
32 ounces for ​$3.07 34 ounces for ​$4.01

1 answer

convert each to a unit rate and compare. For example,
$1.06/10oz = $0.106/oz
and so on