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.

[Q]: ['5899', '229', 'm', '3347', 'k', 'q', 'g', '2755', '8727', '2035', '823', '6835', '9271', 'Q']
[A]: 39921


[Q]: ['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']
[A]: 21197


[Q]: ['L', 'V', '1453', '73', '2717', '9053', 'w', '443', '3637', '475', 'h', '4365', 'B', 'u', '7963', 'c', 'n', '2921', '4591', '6721']
[A]:
44412