The sum of black and white shirts is 63 + 42 = <<63+42=105>>105
The number of jeans in the store is (2/3) x 105 = <<(2/3)*105=70>>70
The sum of ties and belts is 34 + 40 = <<34+40=74>>74
The number of scarfs in the store is 74/2 = <<74/2=37>>37
There are 70 - 37 = <<70-37=33>>33 more jeans than scarfs in the store.
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