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.

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

['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']
28991

['4531', '4155', '5477', 'X', '9879', '1981', '2125', '7987', '4953']

41088