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.

['r', '2251', 'X', 'H', 'a', '5463', 'g', 'M', '9797', '1581', 'o', 'm', 'v', 'E']
19092

['b', '5689', '119', 'p', 'P', 'J', 'w', 'm', '7397', 'Y', '447', 'O', 'p', '319', 'H', 'U']
13971

['z', 'c', '13', '8785', 'a', 'J']

8798