> > 3. What brand of soap is it? (Density of soap varies from brand to brand.)
> >
>
> Density also varies from batch to batch, so knowing the brand would still only give you an approximation.
>
> Good luck in solving this one, Inspector. (maybe you can come up with the answer before WolfSpirit...)

Do you mean they still use a batch process? I thought it was a continious flow, like an oil refinery!
Howard