You need to create a read-only grid that displays support case information. Data for the support cases is mapped to the "Case" record type with data sync enabled.

Within the record, there are fields named "createdDateTime" and "resolvedDateTime". These two fields store the timestamps for when a case is created and resolved, respectively.

The grid includes a column indicating the number of hours between when the case was created and when it was resolved. This column must be sortable within the grid.

How should you calculate the hour value that will display in the column?