A good place to start is your containers. The cost per container if bought in a case, and don't forget to add the sales tax or shipping that you might have paid.
Your wax, take the amount of wax that it takes to fill a container. It is a good idea to weigh your finished candle to figure out how much wax. Remember that the amount of wax is not the amount the container holds in ounces. I have a formula for you to figure the cost of your wax, scent in any size jar.
Size of your jar in ounces X the cost of wax and scent per ounce X .75= The cost of wax and scent for that jar. (Then you add the cost of your jar).
There you have it it is that easy!
Additives, wick and dye, you can figure out by just adding a general cost. You don't really need to figure it out to the nearest cent.
Now you are ready to markup for your profit. Most people say you should mark up 3X for retail and 2X for wholesale. Sometimes you will need to adjust accordingly. Sometimes you might have to lower your price and make slightly less profit. In other cases where you lower your price on some candles you can make up for it with other candles. You will really just have to see what works for you.