>>> from salaries import *
>>> round(apply_percentage (125, 6.5), 2)
8.12
>>> round(apply_percentage (144.5, 2.1), 2)
3.03
>>> lustrum (2003, 2017)
2
>>> lustrum (2001, 2016)
3
>>> round(salaries (1000.0, 79876.43, 1.1, 103.2, 2015, 2018), 2)
1878.64
>>> round(salaries (1651.5, 153876.43, 0.85, 103.2, 2006, 2018), 2)
3165.85