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:
['l', 'B', 'Y', '7543', '5091', '1917']
answer:
14551


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


question:
['9413', 'p', 'D', 'b', '9965']
answer:

19378