.09 a bar? less than ten cents per bar? are you sure? perhaps you mean 90 cents? do you own an olive orchard and get the lye for free?....LOL.
I spend more than that on fragrance alone. I have actually not figured out my price per bar accurately yet. I can do it only for some soaps. Otherwise I'll have to figure the loss of oil when making herbal infusions, the cost of running the oven, these are hard to figure out. I can do 15% loss for the infused oil, need to scale that to the amount I use. I have not figured out how much to use for each color, my 'line of soaps' is still under construction. Most of my batches are ten bars, so this helps. I should do it for the soaps that do not use infusions, or too much of them.
I have been 'guesstimating' $1 per bar (average 3.5 oz) so I will report back after I calculate some of the easier ones, see how far I was on my guesstimation.