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:
['v', 't', 'a', 'r', 'O', 'I']
answer:
0


question:
['e', '6633', '131', '7459', '3733']
answer:
17956


question:
['Z', '6245', 'N', '1403', 'b']
answer:

7648