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:
['9989', 'B', 'E', '5181']
answer:
15170

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

question:
['9571', '4383', 'b', 'V', 'p', '379', '7915', '9337', 'o', '8401', 'j', '7837', '5153']
answer:
52976