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:
['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']
answer:
28991


question:
['e', 'M', '6357', '1359', 'O', '9427', '9547', '771']
answer:

27461