Dear All,
To make it more clear (or to make you more confused), I would say as under:
As regards to daily rated employees:
Rate per day multiply by no. of days worked or payable. There should not be ambiguity of any kind.
As regards to monthly rated employees:
Rate per month means your salary per month inclusive of your weekly off days and holidays. When you work full month with out any loss of pay day, you should get full salary.
In most of the corporates, the dividing factor to calculate the rate per day, is the number of calendar days.
However, I have seen long years back a company having 30 as a fix dividing factor in all month irrespective of calendar days. It was told to me that, this is an american style. Salary is calculated on the basis of loss of pay days. That means, salary for loss of days is subtracted from monthly rate. Monthly salary is given to staff or while collar people and the company presume that such category do not have loss of pay days generally.
Hope you are confused by me. I just thought of sharing what I know.