If 6 friends each want 2 bars, that's 6 friends * 2 bars = <<6*2=12>>12 bars needed.
Each box contains 3 bars, so 12 bars / 3 bars per box = <<12/3=4>>4 boxes needed.
A box is $7, so 4 boxes * $7.50 = $<<4*7.5=30>>30.
There are 6 friends so $30 / 6 friends = $<<30/6=5>>5 per person.
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