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:
['q', '867', 'e', 'z']
answer:
867


question:
['7067', 'E', 'C', '1879', 'Z', 'u', 't', '2053', '6769', 'r', '5207', '7009', 'H', '5587', 'i', 'M', '1357', 'A']
answer:
36928


question:
['3043', 'a', 'j', '4069', 'B', '6573', '3493', '3861', 'E', 'A', 'O', '8539', '5731', '3471', 'L', 'a', 'I', '4141']
answer:

42921