How to bind product prices outside data grid view textboxes

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C#4.0

I am creating windows application using c#, here I am using my billing form DataGridView my DataGridView columns (Slno, ProductName, Price, Qty, Amout). I am already stored my product(table name) database table, each product stored different four prices (Ex : Ball, price1-10, price2-20, price3-30, price4-40),
When I am entered DataGridView ProductName that time above 4 prices shown TextBoxes outside GridView.

How to create above my project any one give me ideas?

What I have tried:

How to Bind Product Prices outside Data grid view textboxes