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:
['w', 'V', '3359', '8847', '7551', '2481', 'Y', 'j', 'L', 'G', '7905', 'v', '4141', '2229', 'k', 'H', '3517', '3885', '3665', 'O']
answer:
47580


question:
['3121', 'j']
answer:
3121


question:
['B', '2581', '5203', '7475', '8557', 'i', 'm', 't', 'N', 'Z', 'u', '7713', 'Q', '1785', 'B']
answer:

33314