A- How to calculate forecast error? (1 mark)
B- Calculate forecast error for December? (1 mark)
| Month | Sales | Forecast | Error |
| September | 5500 | 3000 | ——— |
| October | 7200 | 4150 | ——— |
| November | 8600 | 9100 | ——— |
| December | 9300 | 7900 |
B- Calculate forecast error for December? (1 mark)
| Month | Sales | Forecast | Error |
| September | 5500 | 3000 | ——— |
| October | 7200 | 4150 | ——— |
| November | 8600 | 9100 | ——— |
| December | 9300 | 7900 |