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
convert each to a unit rate and compare. For example,
$1.06/10oz = $0.106/oz
and so on
To determine which jar of peanut butter is the best buy based on the cost per unit, we need to calculate the cost per ounce for each jar.
To do this, we divide the total cost of each jar by the number of ounces in the jar.
Let's calculate the cost per ounce for each jar:
1) For the jar of 10 ounces priced at $1.06:
Cost per ounce = $1.06 / 10 ounces = $0.106 per ounce
2) For the jar of 24 ounces priced at $2.45:
Cost per ounce = $2.45 / 24 ounces = $0.102 per ounce
3) For the jar of 32 ounces priced at $3.07:
Cost per ounce = $3.07 / 32 ounces = $0.096 per ounce
4) For the jar of 34 ounces priced at $4.01:
Cost per ounce = $4.01 / 34 ounces = $0.118 per ounce
Comparing the cost per ounce, we can see that:
- The jar of 10 ounces has a cost per ounce of $0.106
- The jar of 24 ounces has a cost per ounce of $0.102
- The jar of 32 ounces has a cost per ounce of $0.096
- The jar of 34 ounces has a cost per ounce of $0.118
Therefore, based on the cost per unit, the jar of peanut butter that is the best buy is the one with 32 ounces for $3.07, as it has the lowest cost per ounce of $0.096.