Advance Pricing-Promotion- Promotional Goods

  Promotion- Promotional Goods

It means if someone buy 2 pants (same item number) will get 1 free pant (same item number) .

Select the Modifier Type as "Promotional Goods" and enter the quantity range to get the modifier applied.

Go to define details

So when you get 2 pant you will get 1 pant totally free as 100% discount

Transaction Process Flow

Create the sales order and the enter the quantity as 2 and save the transaction.

So when you enter quantity 2 , new item created for 1 quantity with free of cost. Which is 100% discount.

Click on View > Adjustments to view the detailed information.