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.

['x', '1305', 'b', '8193']
9498

['m', '6153', 'A', '6173', 'x', '7527', '8501', 'g', 'r', 'K', 'I', '3103', '8347']
39804

['519', 'M', '8089', 'p', '4089', 'x', '9467', 'B', '2471']

24635