EAI to CardLinK = THB 142 (Outgoing to Issuer) is broken into the following:
Purchase Amount = THB 100 [Go to A/C 3480012305 set on CardLinK]
MDR 2% = THB 2 (From Purchase Amount, charge from C/H) inclusive VAT
Postage Fee = THB 40 [Go to A/C 3481236005 hard-coded in the CardLinK inhouse program]
Tax Invoice = Gross Amount THB 102 with MDR THB 2 inclusive VAT
VAT of MDR = (2 - 2/1.07) = THB 0.14 (ROUNDED)
Withholding Tax = MDR x 3% = 2 x 3% = THB 0.06 (ROUNDED)