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:
['6731', 'f', '4561', '5601', 'i']
answer:
16893


question:
['c', '4501', 'O']
answer:
4501


question:
['V', '9717', '4471', '5863', 'P', 'H', '4615', 'o', '327', '8351', '1685']
answer:

35029