Question

Melissa paid $12.24 for a 6.35-kg bag of dog food. A few weeks later, she paid $13.99 for a 7.48-kg bag at a different store.Find the unit price for each bag. Then state which bag is the better buy based on the unit price.Round your answers to the nearest cent.

Answer 1

Given:

Melissa paid $12.24 for a 6.35-kg.

In another store, she paid $13.99 for a 7.48-kg.

To find the unit price:

The unit price for a first store is,

`\begin{gathered} Unit\text{ }price=\frac{\text{Total cost}}{\text{Total number of kilograms}} \\ =(12.24)/(6.35) \\ =1.9275 \\ =\text{ \$}1.93\text{ per kg (rounded to the nearest cent)} \end{gathered}`

The unit price of the second store is,

`\begin{gathered} \text{Unit }price=\frac{\text{Total cost}}{\text{Total number of kilograms}} \\ =(13.99)/(7.48) \\ =1.8703 \\ =\text{\$}1.87\text{ per kg (rounded to the nearest cent)} \end{gathered}`

So, the answer is,

The unit price for a 6.35-kg is $1.93 per kg.

The unit price for a 7.48-kg is $1.87 per kg.

So, the better buy is the 7.48-kg bag.