level of investment	total returns for each level
	X1	X2	X3
0	0	0	0
200	600	500	450
400	750	640	610
600	895	740	700
800	990	820	765
1000	995	823	780

The above table are the total returns of investing $1,000 in any of the three businesses:

To Do: create a schedule of investment for one thousand dollars and determine the net return per dollar of investment