When looking at the Sales Module in Product Division, Product Category and Product Item, you will see two metrics: Sales Mix and Attachment. They may look alike, but they represent two different concepts.
What is Sales Mix
This metrics shows what percentage of your total sales every Product (be it Category, Division or Item) represents. The total sum of all single percentages must add up to 100% = total sales.
What is Attachment
Conversely, the total sum of the percentages for the attachment metric does not add up to 100%. Attachment represents how often a product appears on a transaction.
In the example below, Turkey Club Sandwiches appeared on 15.2% of all transactions (15.2% of all transactions had Turkey Club Sandwiches attached to the cheque):
If you look at Sandwiches in the in the Sales Mix example instead, in the first image, you will see they only add up to 16.3% of total sales in terms of revenue.
If you have any questions about this or other metrics, please email firstname.lastname@example.org, and we will be happy to assist you! Happy Tenzoing!