Donation per head / mixed data sets

Haia all

Hoping someone has a magic solution to this one...

We have imported our visitor figures in to Tessitura and I'm looking to show donation per head, so looking at contributions on a specific constituent against the number of tickets booked during that month. (Each museum has it's own constituent). 

I know this is affectively mixing Seats and Tickets cube and Contributions cube, but is there any chance this is possible in one widget? Without me having to update it manually?!

It would be a Contribution Amount (Sum filtered by Fund) / Ticket sales (Sum) for a particular constituent in a particular month

All thoughts super welcome!

Thanks all,

Kirsty

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