the pricing formula ... aguide, although most won't actually realize the kind of profit laid out by this formula. I think most of us under-pay ourselves for the time we invest in our projects, but ultimately you have to come to a compromise: a price the consumer can accept, and a profit margin that makes it worth your while. In any case, it's good to know how others calculate their retail pricetag.
If you have access to candy corn and you work with ESL students/ministry, you can fill up small baggies with candy corn then print the candy corn picture. Staple or tape the picture to the baggies and hand them out. Great way to open up opportunities to talk about the Trinity using 3 colors in 1 candy as a visual example.