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.

['2585', '3043', 'w', '7697', '53', 't', 'A']
13378

['6217', 'A', '1925', 'o', '1433']
9575

['G', 'W', 'l', '703', '8573', 'k', '669', '6145', 'D', '6455', '3795', 'r']

26340