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]: ['6867', 'x', '8481', '5091', '979', 'a', 'S', 'i', 'd', '1591']
[EX A]: 23009

[EX Q]: ['4401', 'p', 'V', 'l', 'H', '7329', 's', '4717', 'l', '1773', '67', '179', 'l', '6991', 'a', '9377']
[EX A]: 34834

[EX Q]: ['E', 'O', '6501', 'Y', 'P', '1281', 'q', 'W', 'i', '99', '4993', '807', 'a', 'X', '4667']
[EX A]:
18348