Hi Greg,
Thank you for your answer. I think If I can have a general answer that can be applied to spreadsheet code, that will be great! But would take any answer.
Thank you very much!
1) I have a list of customers who have bought a product and consumed it on a certain date.
I receive every month an excel sheet with the following columns:
Customer_Account / Activation_Date / Country /
2) I have another excel sheet with the volume of sales of that product by Country.
I also...