Promotion event by quantity is triggered by minimum quantity on the transaction, you can give discount or reward gift to your customer if they buy your product with required minimum transaction that you set before.
I. Adding Promotion By Quantity
Step 1. Go to promotion menu then click the promotion event tab and click add button
Step 2. Fill in promotion event form then click submit
Step 3. Promotion event by quantity successfully added
II. Use Promotion Event By Quantity
Step 1. Go to sell menu and input the product then press the Ok button
**** Buy 2 Cardigan (L) will get one Cardigan (L) free / Buy 2 get 1 free
Step 2. Select reward
**** Reward options will appear if you meet the specified minimum spending requirements