Table 2. Centroid based TOSI’s.

No.	Combination
1	X1	X2	X3	X4
2		X2	X3	X4
3	X1		X3	X4
4	X1	X2		X4
5	X1	X2	X3
6			X3	X4
7		X2		X4
8		X2	X3
9	X1			X4
10	X1		X3
11	X1	X2
12	X1
13		X2
14			X3
15				X4
	X1	X2	X3	X4
T i,∼i	0.3396	0.3318	0.2283	0.2310
TS i	0.2239	0.2211	0.0936	0.0943
$T{S}_i^{tot}$	0.4427	0.4326	0.2977	0.3012
% TS i	35.4%	34.9%	14.8%	14.9%
$\%T{S}_i^{tot}$	30.0%	29.3%	20.2%	20.4%

X1: preference for the store utility (α)

X2: preference for accessibility (β)

X3: dollar amount of purchase

X4: store operating cost per day.