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

['W', '3629', '6053', '1035', '1717', 'n', 'y', '9585', 'D', '5125', 's', '9801', '2905', 'E', '5797', 'T']
45647

['5895', '7711', 'n', '1941', 'U', '4065', 'p', 'R', '9567']

29179