What is the correct way to enter supplier discounts and additional charges in purchase entries?

BUSY offers two methods to apply discounts in your purchase voucher. These are:
Item-wise Discount: This method allows you to apply a discount percentage or amount for each item in the invoice. You can use this method if you want to give different discounts for different items. 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. Then, select the voucher series and click on Voucher Configuration.
Step 3: 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 4: Now, when you create a purchase 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 purchase 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.
If you want to add an additional charges in your purchase voucher, you can follow these steps:
Step 1: When add the purchase voucher you can use the Bill Sundry option in the voucher.
Step 2: There is a bill sundry already created with the name Freight & Forwarding Charges. Further if you want to create different press F3 on Bill sundry row and can create, and enter the amount of the charges. And resave the voucher.