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: ['1203', '6179', '9835']

Answer: 17217


Question: ['q', 'U', 'I', '5245', 'g', 'Y', 's', 'V', 'b', 'V', 'D', '1193', 'p']

Answer: 6438


Question: ['3767', 'S', '1407', '6113', 'G', 'E', '3579', '1535']

Answer:
16401