Add-on sales are what the customer buys beyond the treatment that was booked - typically products sold across the counter while the customer is already at the register.

There are nine add-on sales widgets: three figures, each in three versions.

• Add-on sales number: how many add-on sales were completed.
• Add-on sales value (total): the total value of the add-on sales.
• Add-on sales value (avg): the average value per add-on sale.

Each of the three is available on its own, vs. period and vs. target. The average is often the most useful to set a target on, because it does not fluctuate with how busy you have been.

Add-on sales are calculated in three steps, and it is worth understanding them before you apply limits:

1. In the selected period, all purchases through the register are found that have a specific booking attached to one or more line items. So only transactions connected to an appointment count - a pure product purchase without a booking does not.
2. Within those purchases, the line items that do not contain a booking are found.
3. The value of exactly those line items is the add-on sale.

This is why add-on sales widgets have two sets of limits, each working on its own step:

• On the purchase (step 1) you can limit by cash registers, clerks, newsletter subscription and gender.
• On the add-on line items (step 2) you can limit by products and product groups.

So if you want to measure add-on sales of skincare products, the product group must be set on the line item limit - not on the purchase.