In these days I was trying the inventory forecast, but I can't understand the meaning of the grouping.
If I group the data by week, it sums the data of every day of the week, but it makes no sense.
For example if every days of the week #1 I have 20 unit of a product, it doesn't mean that in the week I have 140 unit of this product.
I attach some screenshot:
https://ibb.co/zr7f1RR
https://ibb.co/J5f4Qgq