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:
['a', 'm', '3205', '1869', '1117', 'K', '5785']
answer:
11976


question:
['5715', 'r', 'R']
answer:
5715


question:
['8115', 'Y', '1045', 'm', 'O', '9073', '6813', 'g', 'I']
answer:

25046