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.

['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']
44812

['8109', '6811', 'f', 'l', '5869', 'm', '4657', 'y', 'P', '7983', 'o', 's', 'i', 'm', '2141', '4497']
40067

['5207', '8005', 'x', '6085', '9029', 'n', 'f', 'h', '3189', 'A', 'I']

31515