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: ['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']

Answer: 44812


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

Answer: 23066


Question: ['P', 'B', '5503', 'S', '5981', '4185', 'I', 'I', 'a', '9193', 'q', 'I', 'z', 'J', 'I', '717', '6015', 'y']

Answer:
31594