Currently the gadget (Issue Statistics) for my Finance Ops dashboard shows 'Number of Tickets' & 'Total of Tickets in percentage' by stages (Under Assessment/New/Reviewed/In Progress/Closed).

What I want is, to show 'Total Invoice Amount' for each stages (Under Assessment/New/Reviewed/In Progress/Closed) rather than 'Number of Tickets'. Could it be done? If so, how?
It should be like this...
Example:-
Under Assessment 1 (Number of Tickets) $100.50 (Total of 1 Invoice) 0%
New 3 (Number of Tickets) $600.00 (Total of 3 Invoices) 1%
Reviewed 3 (Number of Tickets) $1000.95 (Total of 3 Invoices) 1%
In Progress 3 (Number of Tickets) $400.20 (Total of 3 Invoices) 1%
Closed 209 (Number of Tickets) $30525.05 (Total of 209 Invoices) 95%
Total Issues: 219 (Number of Tickets) $32626.70 (Total of 219 Invoices)
Urgently need to solve this matter.
Thank you in advance.
Camelia