I’m not sure that works out to be cheaper, especially if you can get the soap in bulk (refill a bottle).

I am sensitive to the synthetic amalgam of proprietary chemicals known as ‘fragrance (parfum)’, and I have to evacuate the house or create major ventilation when anyone showers with a shampoo like Suave. I also then prefer not to go near their head for several hours.

It is odd how those shampoos work, fragrance wise. What I observe is a wave of odor that is emitted from the bathroom and slowly creeps through nearby rooms after the door is opened following showering.