sales	height	width	replicate
1	47	1	1	1
2	43	1	1	2
3	46	1	2	1
4	40	1	2	2
5	62	2	1	1
6	68	2	1	2
7	67	2	2	1
8	71	2	2	2
9	41	3	1	1
10	39	3	1	2
11	42	3	2	1
12	46	3	2	2