sumUp for Jira Cloud
Sums up any numeric field values incl. worklogs and displays the sums in the issue navigator, dashboard gadgets or custom fields
SumUp Filter Result Gadget
This gadget is similar to the Jira Filter results gadget but additionally shows the sum of your column values.
SumUp Two dimensional Filter Gadget
Compute the sums of two optional group fields by using the two dimensional filter gadget. Just choose two group fields, a value to sum up and your issues.
SumUp Filter Gadget
Get sums of multiple fields by using this gadget. Select issues by using a filter or a JQL Query.