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: ['v', 't', 'a', 'r', 'O', 'I']

Answer: 0


Question: ['D', 'b', 'h', 'p', '1637']

Answer: 1637


Question: ['6803', '2345', 'x', 'r', 'S', '4853', 'O', '4107', 'T', '2223', '2753']

Answer:
23084