sales = c(4.806143, 0.493341, 2.328025, 5.147165, 2.034100, 2.206565, 4.749384, 1.956804, 2.694561, 2.500507, 4.130025,
4.537172, 6.256565, 3.619315, 7.623387, 6.743628, 5.408438, 6.681631, 7.281107, 6.154740, 5.45927, 4.449316,
7.448217, 7.119899, 8.352033, 7.969861, 8.056741, 7.574664, 7.531067, 9.434973, 8.970575, 9.461088, 7.002206,
9.093380, 13.337633, 11.535155, 11.717413, 9.252119, 11.549189, 10.771156, 11.491301, 12.646587, 11.778032, 13.171053,
11.445970, 11.869218, 12.450750, 16.155095, 15.935818, 11.900609, 15.305714, 15.222572, 13.269237, 15.535932, 17.362972,
15.036931, 14.919340, 15.115534, 16.650950, 16.754245)