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:
['D', '1693', 'f', 'B', 'o', '3947', '8667', 'f', '6721', '4191', '79']
answer:
25298


question:
['T', '8333', 'C', 'Z', 'n', '1419', 'd', '3205', 'D', '1187', 'd']
answer:
14144


question:
['v', 'y', '2085', 'y', 'P', 'X', '2217', '4897', 'O', 'c', 'u', '9153', 'T', 'b', 'z', '9321', 'K', '1499', 'I']
answer:

29172