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:
['n', 'G', '5059', '8343', '8673', 'P', 'N', '5485', '2279', '6121', 'i', 'U', '7277', '8701', 'A', 'b', 'Z', 'R', '6371', 'G']
answer:
58309


question:
['251', '2155', '5029', 'k', 'j', 'I']
answer:
7435


question:
['6269', '833', '4939', 'E', 'G', '9049', '1351', '9481', 'F', '7863', '8113', '1883', 'q']
answer:

49781