That's not a rocket science, just pay proportionally. Post the calculation before the payment, so anyone can verify.
That is what we most likely do, no need to attack me/us. And we will our calculations, of course. We want everything to be fair.
It was absolutely not my intention to be offensive or anything.
I do realise that both of you are in pretty fucked up position, DB just left you a mess to clean up, that's not right. I don't know what are the escrow terms, I hope you did get paid for this.
Anyway, massive thanks for trying to sort it out. Whatever decision you'll make - I'll respect it.