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.

['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']
15421

['c', 'E', 'M', '1303', 'y', 'H']
1303

['y', '5085', '1835', 'G', 'y', '4153', 'z', 'm']

11073