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.

['1493', 'x', 'h', '31', '3327', '1621', '4529', 'd', '377', 'R', 'X', 'Z', 'G']
11378

['c', '7415', '6253', '4477', 't', '9449', '7733', '2325', 'Z', '5413', 'q', 'm', 'R', '8619', '7289', '857', '7273', '7425']
74528

['3575', '8877', '3231', 'v', '9083', '317', 'M', '8975', 'x', 'F']

34058