Question

. A box of national brand cornflakes is $2.09 for 12 ounces. A box of store label cornflakes is $3.09 for 20 ounces. If you have a 15% off coupon for the national brand, which is the better buy?

Answer 1

It will be better to buy the national brand cornflakes as it is less costlier.

Explanation:

A box of national brand cornflakes is $2.09 for 12 ounces.

So, per ounce cornflakes of national brand costs
`(2.09)/(12) = 0.174` dollars.

Now, if I have a 15% off coupon for the national brand, then the per-ounce cost for national brand cornflakes will be
`0.174(1 - (15)/(100)) = 0.148` dollars.

It is given that a box of store label cornflakes is $3.09 for 20 ounces.

Then the per-ounce cost for store label cornflakes will be
`(3.09)/(20) = 0.154` dollars.

Therefore, it will be better to buy the national brand cornflakes as it is less costly. (Answer)