Hi,
Please read slowly, it's complicated:
1) we quoted F&P part "A" at baht 3300
2) F&P issue PO for part "A"at baht 3000
3) we issue PO to buy part "A" from Prima at baht 2000
4) Prima deliver part "B" (replacement of part A) at baht 3100
The problem is every things was wrong.