B'way B.O. divided into haves, have nots
'Boy From Oz' sees largest gains</b><br /> Paralleling the notion of two Americas, there are two Broadways. Shows at the top of the B.O. chart increased their receipts while those at the bottom continued to wilt in the summer heat. Last week, 27 productions brought in $15,168,615, up a fractional 0.04% or $162,912.<br /> That's about what new tuner "Dracula" ($133,879) grossed in its first three previews.