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.

Ex Input:
['l', '2511', '2071', 'o', 'F', '7583', '1909', '1859', '3299', '3853', 'h', 'P', 'P', '9175', 'B', 'F']

Ex Output:
32260

Ex Input:
['6957', '4603', '5299', '8451', '9803', 'b']

Ex Output:
35113

Ex Input:
['j', '1971', '9469', 'l', '7867', '6053', 'q', 's', '5555']

Ex Output:
30915