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:
['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']
answer:
30859

question:
['g', '6819', 'u', '7729', '5051', '161', '3249', 'y', 'y', 'S', 'j', 'H', 'f', 'G', '6679']
answer:
29688