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.

['Q', 'v', 't', '223', 'm', 'l', 'c', 'M', 'b', '2227', 'P', 'e', 'n', 'f', 'S', '2205', '3517', '5545']
13717

['543', '8351', 'I', 'M', '6647', '731', 'b', 'r', 'l', '3935', 'k', 'z', 'v', '2131', '7781', 'X', '9419', '5013', 'F']
44551

['921', 'c', '965', 'y', '4739', '6007', 'b', '6825', 'f', '3675', 'm', 'n', 'g', 't', '697', 'J']

23829