In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
--------
Question: ['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']

Answer: 39921


Question: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']

Answer: 28041


Question: ['f', 'H', 'U', 'l', 'n', 'q', '2701', '339', 'X', 'H', 'O', 'q', '2313']

Answer:
5353