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:
['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']
answer:
42165


question:
['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']
answer:
21197


question:
['1211', 'g']
answer:

1211