How can I get maximum value for any line item. Dimensions are, days in a year ( 1, 2, 3....) and Item numbers
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
Item 1 | 0 | 2 | 3 | 4 | 5 | 6 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Item 2 | 0 | 0 | 0 | 0 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 0 | 0 |
Item 3 | 0 | 0 | 0 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 0 | 0 | 0 | 0 | 15 |