How do I record discounts and promotions in BUSY?

BUSY offers two methods to apply discounts in your vouchers. These are:
Item-wise Discount: This method allows you to apply a discount percentage or amount for each item in the invoice. To enable it follow these steps:
Step 1: Go to Administration and click on configuration.
Step 2: Choose the Voucher Series Configuration option and select the voucher type that you want to apply the discount for, such as sale, purchase, etc. 
Step 3: Then, select the voucher series and click on Voucher Configuration.
Step 4: You will see the Item-wise Discount feature. Set it to Y to enable it and choose the discount structure from the drop-down list. Then, click on Save.
Step 5: Now, when you create a voucher, you can enter the discount percentage or amount for each item after entering the item details.
Bill-wise Discount: This method allows you to apply a discount percentage or amount for the whole voucher. You can use this method if you want to give a uniform discount for the entire bill. For apply this you can use the Bill Sundry option in the voucher. There is a bill sundry already created with the name Discount You can select this option and enter the percentage or amount of the Discount. This will deduct the Discount from your invoice.