Spreadsheet: 853202d1703103368-how-to-sum-first-12-cells-in-a-row-once-a-cell-has-data-vertical-example-workbook
Sheet: Sheet1

name | 2018-05-01 00:00:00 | 2018-06-01 00:00:00 | 2018-07-01 00:00:00 | 2018-08-01 00:00:00 | 2018-09-01 00:00:00 | 2018-10-01 00:00:00 | 2018-11-01 00:00:00 | 2018-12-01 00:00:00 | 2019-01-01 00:00:00 | 2019-02-01 00:00:00 | 2019-03-01 00:00:00 | 2019-04-01 00:00:00 | 2019-05-01 00:00:00 | 2019-06-01 00:00:00 | 2019-07-01 00:00:00 | 2019-08-01 00:00:00 | 2019-09-01 00:00:00 | 2019-10-01 00:00:00 | 2019-11-01 00:00:00 | 2019-12-01 00:00:00 | 2020-01-01 00:00:00 | 2020-02-01 00:00:00 | 2020-03-01 00:00:00 | 2020-04-01 00:00:00 | 2020-05-01 00:00:00 | 2020-06-01 00:00:00 | 2020-07-01 00:00:00 | 2020-08-01 00:00:00 | 2020-09-01 00:00:00 | 2020-10-01 00:00:00 | 2020-11-01 00:00:00 | 2020-12-01 00:00:00 | 2021-01-01 00:00:00 | 2021-02-01 00:00:00 | 2021-03-01 00:00:00 | 2021-04-01 00:00:00 | 2021-05-01 00:00:00 | 2021-06-01 00:00:00 | 2021-07-01 00:00:00 | 2021-08-01 00:00:00 | 2021-09-01 00:00:00 | 2021-10-01 00:00:00 | 2021-11-01 00:00:00 | 2021-12-01 00:00:00 | 2022-01-01 00:00:00 | 2022-02-01 00:00:00 | 2022-03-01 00:00:00 | 2022-04-01 00:00:00 | 2022-05-01 00:00:00 | 2022-06-01 00:00:00 | 2022-07-01 00:00:00 | 2022-08-01 00:00:00 | 2022-09-01 00:00:00 | 2022-10-01 00:00:00 | 2022-11-01 00:00:00 | 2022-12-01 00:00:00 | 2023-01-01 00:00:00 | 2023-02-01 00:00:00 | 2023-03-01 00:00:00 | 2023-04-01 00:00:00 | 2023-05-01 00:00:00 | 2023-06-01 00:00:00 | 2023-07-01 00:00:00 | 2023-08-01 00:00:00 | 2023-09-01 00:00:00 | 2023-10-01 00:00:00 | 2023-11-01 00:00:00
Customer 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 317.22 | 2334.24 | 1767.11 | 1580.93 | 2812.9 | 2822.78 | 3707.76 | 1396.77 | 1520.9 | 2491.46 | 4583.58 | 1538.57 | 931.91 | 1127.15 | 1317.4 | 1128.23 | 957.02 | 1463.94 | 832.65 | 1105.46 | 1242.03 | 1439.31 | 1570.58
Customer 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 74215.16 | 842.56 |  |  |  |  |  |  |  |  | 23.44
Customer 3 | 1469.47 | 7552.36 | 8482.67 | 8547.23 | 8101.88 | 12125.09 | 10448.2 | 8358.85 | 11138.97 | 9675.39 | 9965.99 | 6262.42 | 6832.81 | 6400.26 | 6114.74 | 4921.84 | 8129.29 | 10714.12 | 10162.47 | 13327.02 | 4232.04 | 2694.07 | 4045.99 | 4119.56 | 932.46 | 1235.13 | 13077.86 | 1079.79 | 1696.46 | 1335.9 | 1589.21 | 19913.75 | 938.71 | 1506.23 | 1296.85 | 1870.64 | 1841.06 | 1436.93 | 1176.14 | 703.56 | 960.24 | 2297.33 | 2322.78 | 2556.24 | 2113.41 | 3267.21 | 4100.15 | 2486.26 | 3044.19 | 2865.08 | 2539.59 | 2316.7 | 3055.37 | 2745.4 | 2427.21 | 583.79 | 1643.7 | 1546.34 | 3362.03 | 2395.07 | 5187 | 2043.65 | 2614.6 | 2682.31 | 3730.26 | 2369.07 | 1562.47
Customer 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 92690 | 1408.99 | 255.58 | 596.51 | 1147.74 | 740 | 206.89 | 103690.71 | 18651.44 | 72.04 | 120 | 114 | 41.99 | 25.3 | 176.97 | 42.55 | 21845 | 105.58 | 88653.85 | 67668.74
Customer 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5970 | 505 | 110 | 3480 | 6480 | 612 | 3678 | 1680 | 3750 |  | 6367.73 | 6362.52 | 4241.94 | 618.77 | 4045.57 | 134.38 | 4536 | 6135.69 | 5707.79 | 2495.85 | 11659.85 | 1364.88 | 6781.52 | 11257.25 | 626.55 | 1124.06 | 114733.29 | 172425.6 | 95043.78 | 107818.3 | 174611.69 | 227954.91 | 125796 | 8972.65 | 5250.42 | 234244.39 | 198304.53 | 212172.4 | 156801.65 | 205707 | 208416 | 265173 | 332201.99 | 178532.83