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]: ['8871', '1297', 'W', 'f', 'Y', '8731', '113', '6707', '379', '9631', 'X', 'C', 'q']
[A]: 35729


[Q]: ['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']
[A]: 25220


[Q]: ['Z', 'm', 'I', 'w', 'X', '131', 'W', 'h', 'U', '2153']
[A]:
2284