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: ['W', '8593', '9427', '9931', '8919', 'X', 'B', '8861', '1933', 'Z', 'V', '3427', 'S', '8717', 'd', '1593', '7659', 'Q', 'n']

Answer: 69060


Question: ['6957', '4603', '5299', '8451', '9803', 'b']

Answer: 35113


Question: ['9771', '3413', '3657', '8291', 's', 'F']

Answer:
25132