Cost information for the following is not included. Normally this is because the quantity or ingredient is unknown
1 c. extra-fine granulated sugar
1/4 tsp lemon oil (optional)
  (sold at gourmet stores)
1/8 tsp citric acid (optional)
  (sold at health food stores)
  Sparkling or possibly spring water as needed
  (Perrier preferred)
2 x thinly-sliced or possibly quartered lemons -(to 3)
  Mint leaves
Suggestions?