You'd have to do the math, but here's a site which breaks down Manchester United's salaries by the week (why the hell they do it by week, I don't know)
http://freshmanutd.com/manchester-un...-wages-201415/
And here's their fiscal report for 2013
http://ir.manutd.com/phoenix.zhtml?c...cle&ID=1855756
Now, obviously this doesn't include things like taxes, stadium costs, etc. But their expected revenue for 2014 is above 420 million pounds. 80 Million US dollars, the supposed value of the jersey sponsorship, is not an insignificant percentage of that money.