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]: ['n', 'W', '565', '6625', '903', 'o', '7995', '8339', '5251', 'e', 'a', '1081', '5813', 'o']
[EX A]: 36572

[EX Q]: ['A', '9775', '5867', 'n', '1329', '5973']
[EX A]: 22944

[EX Q]: ['q', '8843', 'n', '8123', '7781', '5403', 't', '8803', '4975', 'B', 'j', 'Q', 'Z', 't', 'M', 'M', '1557']
[EX A]:
45485