subject			storeA	storeB	storeC	storeD
lettuce			1.17	1.78	1.29	1.29
potatoes		1.77	1.98	1.99	1.99
milk			1.49	1.69	1.79	1.59
eggs			0.65	0.99	0.69	1.09
bread			1.58	1.70	1.89	1.89
cereal			3.13	3.15	2.99	3.09
ground.beef		2.09	1.88	2.09	2.49
tomato.soup		0.62	0.65	0.65	0.69
laundry.detergent	5.89	5.99	5.99	6.99
aspirin			4.46	4.84	4.99	5.15