In LS Retail POS Discount is calculated on "Unit Price including VAT"

In LS Retail POS, the Discount is calculated on "Unit Price including VAT".

Instead discount should be calculated on "Unit Price" and then VAT should be calculate on "Discounted price"

Ex:

Quantity: 1

Unit Price: 80.00

Discount: 8%

VAT: 6%

Now:

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Unit Price including VAT =  "Unit Price" + ("Unit Price" * 0.06)  i.e: 80 + 4.8 = 84.80

Discounted Amount = (Unit Price including VAT * 0.08) i.e: 84.80 * 0.08 = 6.784

Total Including VAT = Unit Price including VAT -  Discounted Amount   i.e: 84.80 - 6.784 = 78.016

Required:

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Discounted Amount = "Unit Price" - ("Unit Price" * 0.08) i.e: 80 - 6.4 = 73.6

TAX Amount = Discounted Amount * 0.06 i.e: 73.6 * 0.06 = 4.416

Total Including VAT = Discounted Amount + TAX Amount i.e: 73.6 + 4.42 = 78.016

Both will give Total Including VAT as same. But logically VAT must be applied on Discounted Amount and it must be printed in the same format.

Any setting to be done, to have the VAT calculation done on Discounted Amount

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