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:
['w', '2281', '8651', '2203', 'q', 'n', '4253']
answer:
17388


question:
['m', '3481']
answer:
3481


question:
['7349', '5989', 'h', 't', 'a', '7713', 'E', '3711', 'S', '5879']
answer:

30641