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:
['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']

Ex Output:
15462


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

Ex Output:
19594


Ex Input:
['1307', 'm', '2333', 'Q', '8133', '1351', '3533', '5937', '6597', '3367', 'u', 'F', 'P', '1653', '3395', 'n', 't', 'v']

Ex Output:

37606