Daily Rate is where the whole day or the hours entered for the day selected is charged at the different rate and will be calculated by the system
Go to the Costing tab of the assignment and click Assign pay rates to specific days. Then, tick the days to which the new rate should be applied (make sure that you untick these days from the first rate set). Add your rate to be applied. Below we are selecting a different rate for Saturday, Sunday and Bank holidays.
The timesheet is then entered with days worked for Saturday.
The timesheet cost will then be calculated correctly with 5 units being applied for the days worked Monday thru Friday, and one unit for Saturday.