instruction:
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.
question:
['29', 'N', '5061', '7191', 'z', '8367']
answer:
20648


question:
['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']
answer:
25754


question:
['y', '8057', '4139', '4193', 'c', 'j', '7013', 'd', '6059', '751', 'q', '8515', 'o', 'p', 'V', '2135', 'C']
answer:

40862