NS Pay Allowance: Pro-rated OR Advance CNY Pay OR What Else?

Bank statement as follows

28 Jan 2011 IBG BY :MINDEF C03 PART/REF: Sxxxxxxxx
S$252.46

whats this sum of money ?

You're asking us?

fuck la, got money just take loh...........

no la i curious mah i wan ask why suddenly give , what does IBG means ?

Internet banking transfer. For February.

wierd sia not even pay day

maybe this is your 13th month bonus.....?