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:
['v', 'Y', '4135', '8645', '263', '5377', '8677', 'Z', 'W', 'g', 'n', 'r', 's', '8513', '5677', 'u', '3033', 'I']
answer:
44320


question:
['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']
answer:
44812


question:
['r', '6643', 'b', 'Q', 'U', 'H', '5179', '9249', '429', '2967']
answer:

24467