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.

['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']
27231

['2215', '4369', 'e', '4979', '4069', 'J', 'L', '789', 'w', 'p', '9533', '8523', '2531']
37008

['2311', '1179', '7091', 'L', '3703', '997', 'W', '7063', '9811', '9219', '7665', '9295', '7673', 'P']

66007