Have to agree with FL here Swab, revenue streams, in this context and as far as I understand them, do not account for expenditure. I get what you're saying about the forecast estimate by KPMG having read the report on their website, but that still does not account for costings, as one of the footnotes on the report says. We've not released the detailed financial information yet, so as I understand it KPMG are estimating our loss of revenue, due the loss of various 'streams' of revenue (matchday income, broadcasting rebate etc.).
With that said, in reference to what shawspeed has posted about in regards to costs equalling loss of revenue, I don't think this is possible. Any potential costs cut through loss of matchday staff, or policing, are going to be nowhere near the total loss in revenue. We will still be paying people to upkeep the stadium, and although maybe we save some money by not providing catering services for example, that is never going to outweigh the lost income from matchday sales, tickets etc.