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:
['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']
answer:
31945


question:
['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']
answer:
28041


question:
['4303', 'R', '195', 'u', 'S', '2767', '187', '8901', '9003', '6021', 'g', 'H', 'b', 'X', 'S', 'e', 'a', '6743']
answer:

38120