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:
['8669', '9115', '2573', '9261']
answer:
29618


question:
['r', '6537', '3001', '7879']
answer:
17417


question:
['i', '8957', 'P']
answer:

8957