is there a good (simple) formula for working out DROI? {nm} Oct 25, 20:50
My quick and dirty method is Oct 25, 22:13
The longer, less quick-and-dirty method... Oct 26, 19:42
maybe I've hit my math ceiling ... Oct 26, 22:00
^ means "to the power of" and / means "divide by" . . . Oct 27, 06:30
thanks everyone Oct 27, 19:32