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.

['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']
69093

['M', '9933', '9861', 'f', 'N', 'R', '7625', 'p', 'T']
27419

['c', 'G', 'U']

0