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: ['b', 's', 'v', '4757', '9063', 'I', '8397', '7975', 'Q']

Answer: 30192


Question: ['x', '9895', 'r', 'H', 'C']

Answer: 9895


Question: ['e', 'Q', '6517', '6469', '5055', '4175', 'U', '6735', '87']

Answer:
29038