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: ['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']

Answer: 22867


Question: ['4533', 'D', '823', 'a', 'x', 'p', '9787', '2587', 'T', 'Z', '2207', '8719', 'F', '7675', 'T', '2777', '203', 'N', 'o']

Answer: 39311


Question: ['D', 'O', '5171', 'O', 'h', 'u', '7707', 's', '6987', 'v', 'd']

Answer:
19865