It says
12-ounce package is sold at $3.84
And we have to find the Unit price
Unit price means the price of unit quantity
which here will be 1 ounce , that is we have to find the price of 1-ounce package
Now 12-ounce package is sold at $3.84
to find the price of 1-ounce package we divide price by 12
that is
Unit price =

So unit price is $3.125 per 1-ounce package