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]: ['2775', '7405', 'F', 'D', '9025', '827', 'e', 'j', 's', 'e', 'Q', '1137', 'G']
[EX A]: 21169

[EX Q]: ['8821', '7221']
[EX A]: 16042

[EX Q]: ['U', '5237', '5021', 'd', '2961', 'f', '4441', '5413', 'I', 'R', 'u', '925', '1611', '2761', 'Y', 'n']
[EX A]:
28370