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.

['4161', 'E']
4161

['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']
27212

['3751', 'O', 'O', 'S', '553']

4304