>>> from teatre import costcomanda

>>> teadic = {'PLATEA': [100, 40], 'ANF': [50, 30], 'LAT': [50, 20]}
>>> costcomanda(teadic, ('PLATEA', 2))
80
>>> costcomanda(teadic, ('LAT', 8))
160
>>> costcomanda(teadic, ('PLATEA', 3))
120
>>> costcomanda(teadic, ('ANF', 5))
150