This one is very simple yet powerful illustration, on How GP calculates Sales Taxes, from Frank Hamelly on his gpTip42Day.

I am writing an Pointer Article to this inspite of adding gpTip42Day as a Side Bar Link, as this article taught me the actual calculation behind Sales Taxes. I usually assume from the way the amounts are arrived at, but I had never known about the theory behind it.

Must read.

VAIDY