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: ['5829', '9755', '67', 'F', '6347', 'p', 'i', 'X', 'z', 'o', '2321', 'F', '6145', 'B', '3903']

Answer: 34367


Question: ['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']

Answer: 17432


Question: ['S', '7157', '3989']

Answer:
11146