Recurring reports - Editing

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In the VRM it appears there is no way for a user to ‘edit’ a reporting template they have created.
Given the constantly changing price of generator fuel, would it be possible to allow a user to edit the fuel cost used in calculating a report.
It appears currently a user must create a new report & delete the old report to simply amend the price used for fuel cost calculations.
I appreciate this would require some logic to allow for pro-rata calculation of the final reporting costs, based on the date of change.