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:
['k', 'Z', 'r', 'K', 'b', 'X', 'A']
answer:
0


question:
['B', '9189', '3691', '2869', '1525', 'd', 'H', 'P', '8613', 'b', 'r', '5289', 'V', '6433', '8733', 'K', '8105', '1041', 'U', 'L']
answer:
55488


question:
['H', '1383', 'I', 'E', 'S', '975', '8129', 't', 'z', '7915', 'R', '41', 'o', '4603', 'z', '8795', '4103', 'E', '5441']
answer:

41385