Hi Chayanit,
At the first DN, you billed FSC as 3.5* USD 0.34 =1.19. But this is incorrect since FSC rate should be USD 0.31.
Then you sent me a credit note with amount -USD0.11. So the FSC amount became USD 1.08.
Actually, the correct amount should be 3.5* USD 0.31 =USD 1.09.
That's why I ask you to amend the credit note to -USD 0.1 only (but not -USD 0.11). I hope I am clear on this.