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:
['f', '6703', 'c', 'c', 'l', '2511', '6507', 'b', '9727', 'l', '1251', 'I', '5231', '91', 'L', 'M', 'd']
answer:
32021


question:
['v', 't', 'a', 'r', 'O', 'I']
answer:
0


question:
['f', '6701', 'Y', '3271', '6369', 'b', '7123', '3207', 'O', 'P']
answer:

26671