>>> from commissions import commissions

>>> round(commissions (50000.0, 80000.0), 2)
0.0
>>> round(commissions (50000.0, 825350.0), 2)
24760.5
>>> round(commissions (515263.0, 80000.0), 2)
257.63
>>> round(commissions (753850.0, 500000.0), 2)
15376.92
>>> round(commissions (500000, 753850.0), 2)
22865.5