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.

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

[EX Q]: ['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']
[EX A]: 30859

[EX Q]: ['O', 'c', 'O', 'T', '6567', 'G', '1971', 'L', '4463', 'N', 'W', '243']
[EX A]:
13244