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:
['4463', '489']
answer:
4952


question:
['2625', '1611', 'E', '4507', '3013', '1569', 'M', '2607', '1111', 'W']
answer:
17043


question:
['959', 'U', 'J', '5723', 'B', 'D', 'r', 'A', '8341', 'c', 't']
answer:

15023