There is 2 thing i very confuse.
If you are using EA as reference, 4.5 days won't appear. When the amount is 0.5 or more than it, is consider 1 days.
The most curious is May 2011 not yet over, i wonder how you hold her May salary.
May - Full month salary
June - Divide by the days of the month (June is 30 days)
You need to do 2 pay slip, 1 is May pay slip and 1 is June pay slip. You need to contribute the EPF and SOCSO as well even she already tender resignation letter for the month of May and June.