Hi there,
For the column in your report (value expression), I have a couple options and you can modify:
Days between entry date & actual start date:
displayname=[whatever you want to call the column]
textmode=true
valueexpression=CONCAT(ROUND(WORKMINUTESDIFF({entryDate},{actualStartDate})/480,2)," Days")
valueformat=HTML
Days between actual start date & actual completion date:
displayname=[Turnaround time or whatever you want to call the column]
textmode=true
valueexpression=CONCAT(ROUND(WORKMINUTESDIFF({actualStartDate},{actualCompletionDate})/480,2)," Days")
valueformat=HTML
For summing 2 fields in a column:
displayname=[whatever you want to call the column]
textmode=true
valueexpression=SUM({field1},{field2})
valueformat=HTML
If this helped you, please mark correct to help others : )