>>> from expenses import dayexpenses

>>> l= [2.0, 3.0, 4.0, 5.0]
>>> dayexpenses(l)
>>> l
[2.0, 3.0, 4.0, 5.0, 14.0]
>>> l = [3.2, 5.8, 11.4]
>>> dayexpenses(l)
>>> l
[3.2, 5.8, 11.4, 20.4]