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.

['G', 'Z', '4819', '9763', '9987']
24569

['2225', '1925']
4150

['L', 'p', 'i', '6103', '4689', 'g', '8627', 'X', '1365', 'g', 'F', '2645', '4893', '3309', '3071']

34702