I need to calculate the days based on the difference between two dates

Hi,

Thank you all in advance.

I need your help please.

I have few calculations to configure in the present report.

I have below listed columns

Plan date

Start Date

Closing date

Due date

Now I need to calculate the following :

Based on current date… # of days overdue

Overdue can come from Plan date or Due Date

# of days between Plan Date and Due Date

# of days between Current Date and Start Date

# of days between Plan Date and close date

# of days between Start Date and Plan Date

# of Days between Start Date and Due Date

Do I have to create an individual variable for each calculation? or Can I single variable which handles all the calculations and how will it effect the report? Please help me through here.

PS-Client might request the color coding eventually.