Because the customer can chat with PBAT price 192500THB, which equals the vat tax (7264 packing Transport = (3000 6500 15204 16043) = 40747THB = 1538SGD total cost price is SGD 7274 5737 = 1538.
Because the PBAT 192500THB talked to customers at a price which is equal to 7264. (Transport + Packing + Tax + VAT = (6500 +3000 +15204 +16043) = 40747THB = 1538SGD. overall cost is 5737 +1538 = 7274 SGD.
Because the PBAT talk to customers at prices 192500THB which was 7264 (Transport packing tax VAT = (6500 3000 15204 16043) = 40747THB. Total cost = 1538SGD is 5737 1538 = 7274 SGD.