The Cross Promotion count toggle determines whether products that are on promotion, but not active on that promotion should count towards the quantity of the promotion. 

Enable Cross Promotion Count

Enabling Cross Promotion count makes promotion calculation significantly quicker. This can be turned on or off in your General Settings. 

1. Navigate to Menu > Setup > General
2. Select Company Settings
3. Select Cross Count promotion
4. Choose a method from the dropdown menu 
5. Select Save

Example

If you have two promotions:

• buy 2 at $20.00
• buy 6, get 10% off

and two products:

• product A, included in both promotions, selling price of $15.00 each
• product B, included in buy 6 promotion only, selling price of $10 each

and sell:

• 4 of product A
• 2 of product B

With Cross Promotion count enabled this will result in a combination of both promotions:

• product A will be sold for $40 (2 x the 2 at $20 promotion)
• product B will be sold at $18.00 (10% off the two items)

With Cross Promotion count is disabled Shopfront will choose between the two promotional options and select the end price that's cheaper for the customer. In this case, it will result in:

• product A will be sold for $40 (2 x the 2 at $20 promotion)
• product B will be sold for $20 (the normal sell price)