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:
['x', 'V', 'g', '5469', 'c', '7873', 'T', 'p', '8109', '5395', 'h', 'z', 'T', '9373']
answer:
36219


question:
['k', 'a']
answer:
0


question:
['9391', 'Y', 'P', 'n', 'I', 'o', 'P', 'e', '9671', '863', 'I']
answer:

19925