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: ['D', 'C', '7295', 'g', 'j', '1387', 'O', '4701', 'B', 'd', 'W', 'b', 's', 'n', 'n', '4917', '2941', '1825', 'x']

Answer: 23066


Question: ['Q', '1669']

Answer: 1669


Question: ['q', '1331', '8291', '1437', 'z', '115', 'm', 'G', '1901']

Answer:
13075