How much will " The Dark Knight " earn in its 2nd weekend?

This question is, how much do you think the now #1 EVER opening weekend movie at the North American Box Office "The Dark Knight" will make in its second weekend at the North America Box Office (July 25th, 26th, and 27th, 2008.)? Predictions settle as such: If for example it earns $80.999 million, then the "$71 million to $80 million" WILL WIN, not the "$81 million to $90 million". It must at least reach $81 million even, in order for "$81 million to $90 million" prediction to win. Remember, this film did $158.4 million in its first weekend (Fri-Sun) and if it falls 50%, that'd put it at around $79.2 million, but if it's hold is pretty good and it only drops 40%, then that'd earn it around $95 million.