First of all we will find per ounce price of each trail mix.
Let us find per ounce price of cran-soy trail mix.
[tex]\text{Cran-soy trail mix cost per ounce}=\frac{2.99}{5}[/tex]
[tex]\text{Cran-soy trail mix cost per ounce}=0.598[/tex]
Now we will find per ounce cost of raisin-nuts mix.
[tex]\text{Raisin-nuts mix cost per ounce}=\frac{3.41}{7}[/tex]
[tex]\text{Raisin-nuts mix cost per ounce}=0.487142857\approx 0.487[/tex]
Let us find per ounce price of lots of cashews mix.
[tex]\text{Lots of cashews mix cost per ounce}=\frac{7.04}{8}[/tex]
[tex]\text{Lots of cashews mix cost per ounce}=0.88[/tex]
Now we will find per ounce cost of nuts for you mix.
[tex]\text{Nuts for you mix cost per ounce}=\frac{2.40}{6}[/tex]
[tex]\text{Nuts for you mix cost per ounce}=0.4[/tex]
Now let us order our trail mix brands from least expensive to most expensive by their per ounce price.
Nuts for you (0.4), Raisin-nuts mix (0.487), Cran-soy trail mix (0.598), Lots of cashews mix (0.88).