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]: ['J', '5149', 'H', 'L', 'm', 'h', '3863', 'n', 'z']
[A]: 9012


[Q]: ['E', 'w', 'h', 'S', '259', 'U', '1429', '919', 'D', '5609', '7377', '7601', 'O', 'W', '43', '4571', '5059', '3267', '3129', 'y']
[A]:
39263