How to Prepare Sales Invoice with GST Tax and Discount on Non Financial Normal Calculator

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I'm Sujoy and today I'll show you How to prepare sales invoice with tax and discount calculation, on normal electronic calculator.
Topics Explained-
1. Understanding a sales invoice
2. What is GST
3. Doing sales invoice calculations
4. Calculating discount
5. Adding tax on invoice amount
6. Finding Grand Total (GT)
7. How to calculate tax percentage without % button on calculator
That's it for now! How is the video? Let me know.
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[@rpalanikumar9596]

Very good and very useful in your guide

[@TechDEEM]

Nice video
And make video on tally software also