Coffee Machine

Cost: 15 RC
Constant Ingredient: Coffee Bean

Mocha Coffee
Sell Price: 159 coins
Products used: Milk
Profit:  31 coins (19.5%)

White Mocha
Sell Price: 173 coins
Products used: White Chocolate
Profit: 63 coins (36.4%)

(The profit I give is based on what it costs to plant the initial crop used. If the items used to create a product are not from a crop, their cost isn't factored into the profit. It's as though I'm assuming the cost is incomparable (RC to coins) or that the item is "paid off").