Just yesterday, City Council President Steve Murphy said BPD told him it was costing $2 million a month to watch over those scamps on Dewey Square. Channel 4, however, reports today that BPD has put the total cost of its supervision of Occupy Boston since Oct. 1 (the occupation began 9/30) at $146,189.55. Assuming that's current through yesterday, and assuming it includes another massive early morning crackdown, that comes out to roughly $350,000 a month.