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:
['7755', '8383', 'y', 'k', '4869', '2809']
answer:
23816


question:
['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']
answer:
21197


question:
['5919', 'w', '6569', 'u', 't', 'e', '7995', 'k', 'd', '5341', '8157', 'q']
answer:

33981