This is my very first one.... so go easy on me. 
That includes shirt but no labor yet. I have to cut the design , weed it and heat press. Like I said this is my very first one/sale so all input helps.That incl. the shirt or just the stones?
I'd at least double your costs and then add for your labor, 25$ sounds cheap to me unless you have less than 20 min in labor
If you sell too cheap out of the starting gate it is very to raise prices later...Folks may be talking about how good it was but they will also be talking about how cheap it was....Good luck!
At first, yes. Once you get hot n' heavy in it, you will learn what you can charge and get away with. Also, look around in your area and see what things like this are going for....I think I am better off giving stuff away free, versus selling it cheap......