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 Input:
['3331', '5791', 'r', 'Q', '2243', '8229']

Ex Output:
19594


Ex Input:
['2625', '1611', 'E', '4507', '3013', '1569', 'M', '2607', '1111', 'W']

Ex Output:
17043


Ex Input:
['1603', '5797', '3443', '2537', '1289', 'R', 'j', 'V', 'f', '1927', '9867', '53', '3647', '9957', 'X', '4939', '9685']

Ex Output:

54744