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:
['D', '1611', 'w', '8825', '8987', '3021', '9019', 's', '87', '9283', '5717', 'f', '1503', '6593', '8533', '785', 'g']
answer:
63964


question:
['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']
answer:
27231


question:
['L', 'I', 'F', 'U', '9857', '2121', '4041', 'Z', '4891', '5535', '4727', 'j', '2659', 'k', 'z']
answer:

33831