This really depends on a lot of variables with the main one being your local electricity costs.

We could, for example look at the cost of ETH rentals vs amount of UBQ received in return for x hash. You can work out an average cost per UBQ from that.
That is some simple maths you could work out.

You could also look at 1GPU with average of 30Mhs.
Then go fishing in a pool to see how much UBQ per Day someone with 30mhs is getting then divide that by local power costs on 500W for a local fiat cost per UBQ. Then just convert to BTC.
 
This has some issues however as China miners will be getting cheaper rates than say, US  or EU Miners.

It all depends on electricity costs at the end of the day.

Something you will need to research locally for yourself then do some simple maths to find your answer.
It will be different for everyone around the world so there is no straight forward answer.