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:
['4601', '6021', '3005', 'I', 'f', '4631', 'Q', 'd', '8041', 'D', '8067', '7383', '757', 't', 'd', 'n', '2275', 'p', 'm', '6021']
answer:
50802


question:
['o', 'L', 'E', 'V', 'D', 's', 'Z', 'm', 'a', '2785', 'I', 'v', 'B', '7909', '1599', 'V', 'N']
answer:
12293


question:
['3735', '6723', 'Y', '165', 'P', '6121', '397', 'B', 'F', 'r', 'c', 'n', '7051', 'G', 'r', '39', '9199', '9991', 'f']
answer:

43421