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

['g', 'A', 'r', '539', '5459', '2725', '7447', '3693', '1757', 'r', 'W', '5949', '4569', '5153', '3985', 'Q', '505', 'M', '8989']
50770

['5857', '1523', '5035', 'B', 'D', 'G', 'E', '5399', 'N', 'Y', '4977', 'R', '5813', 'i', '7733', '8113', 'I', 'z', 'x']

44450