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:
['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']
answer:
27899


question:
['S', 'B', '9109', '9635', '7463', '5387', '8149', 'I', '6557', '8109', '4995', 'B', 'f', 'n', '6307', '8281']
answer:

73992