Dear Sakamoto san,
Actually advance playment should be clear within 7 days is a normal rule and for our control should clear the last one before issue new advance. This is a normal practise in intenal control. So i'd like to ask you contact a vendor to have a condition of credit term. Anyway this time I've already approve your request but for the future cloud you try to find the vendor which they have a credit term.
If any please discuss with Pueng san for norm of andavce.