Question

Charlene and Gary want to make perfume. In order to get the right balance of ingredients for their tastes they bought 2ounces of rose oil at $4.36 per ounce, 5 ounces of ginger essence for $2.15 per ounce, and 4 ounces of black currant essence for $2.27 per ounce. Determine the cost per ounce of the perfume.

Answer 1

First, lets calculate how much the expended in the perfume:

`2*(4.36)+5*(2.15)_{}+4*(2.27)=28.55`

So, for 11 ounces of perfume, they need $28.55, so the minimum that the perfume need to cost per ounce is:

`(28.55)/(11)=2.5954\cong2.6`

So, about $2.6 per ounce of perfume.