Display	Price	Sales	Sales
-1	-1	40.8	34.2
 0	-1	44.2	53.5
 1	-1	91.5	70.5
-1	 0	32.0	31.4
 0	 0	50.2	34.9
 1	 0	85.7	59.3
-1	 1	 9.0	18.0
 0	 1	24.9	24.9
 1	 1	55.9	31.9