Based on historic data, we can break the prospects for the Store in Store concept into 4 scenarios. These can be described as follows:

	Probability	Customers per year (K)	Customer bill per visit ($)	Other VC as percentage of Sales
Exceptional	15%	105	17.00	47.0%
Average	55%	105	15.00	46.0%
Slow	20%	90	11.00	45.0%
Poor	10%	85	10.00	45.0%
	100%

All other inputs are the same as the original assumptions (for example, depreciation is $100K per year for the Store in Store concept in each scenario).

What is the standard deviation of NPV of the Store in Store concept?