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: ['7215', 'd', 'q', 'k', '9301', 'P', 'x', 'C', 'g', 'e', 'o', '2769', '6993', '9769', 'v', '9007', '4131', '8627', 'q']

Answer: 57812


Question: ['679', '6221', '2873', 'K', '1991']

Answer:
11764