Question

Find the price per unit for each item, then choose the best buy. a. Cereal, 10 oz. box for $5.90 would = b. Cereal, 24 oz. box for $ 6.48 would = The best buy would be

Answer 1

10z box = $5.90
1 oz = $5.90 ÷ 10 = $0.59

24 oz box = $6.48
1 oz = $6.48 ÷ 24 = $0.27

24 oz box is cheaper, it is a better buy

Answer 2

Part a) Cereal A
`0.59(\$)/(oz)`

Part b) Cereal B
`0.27(\$)/(oz)`

The best buy is Cereal B

Explanation:

we know that

To find the unit price divide the price by the quantity

Let

x------> the price

y------> the quantity

U------> the unit price

so

`U=(x)/(y)`

Part a) we have

Cereal A

`x=\$5.90`

`y=10\ oz`

substitutes

`Ua=(5.90)/(10)=0.59(\$)/(oz)`

Part b) we have

Cereal B

`x=\$6.48`

`y=24\ oz`

substitutes

`Ub=(6.48)/(24)=0.27(\$)/(oz)`

Compare the unit prices

`Ub<Ua`

therefore

The best buy is Cereal B