day day pay for him first, not "LO FUNG" kar!!! ask him if his surname is FUNG.
monthly payment ?-( ?-( ?-( , i think he will not even pay for this either - - - or just pay a little part of it. :evil:
put a sticky note on his desk/computer DAILY - reminding him how much he owe for breakfast / lunch, let everyone who walks by know - - no need to give him face for this type of cheap person.