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:
['2097', '7815', 'f', '1705', '7553', 'C', 'n', '7091', '1253', 'z', '9229', 'H', 'N', '6481', 'H', 'M', 'G', '4527', '8537']
answer:
56288


question:
['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']
answer:
36604


question:
['M', 'N', '285', 'A', 'Y', 'u', '2893', 'Z', '4329', '1359']
answer:

8866