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: ['A', 'y', 'u', 'S']

Answer: 0


Question: ['d', '5571', '6455', '4287', 'I', 'U', 'M', '8303', '8893']

Answer: 33509


Question: ['6707', 't', 'I', '9285', 'q', 'a', 'A', 'Z', 'w', '4971', '2887', 'O', '1765']

Answer:
25615