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 Q]: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']
[EX A]: 10061

[EX Q]: ['6833', 'R', '7323', 'd', '3487', '8777', '9053', 'y', 'i', 'O', '467', 'b', '5969', 'D', 'B', 'r', '3073', 'i', 't', 'd']
[EX A]: 44982

[EX Q]: ['m', 'I', '3489', 'L', 'f', 'Q', '5829', '6453', 'X', 'L', 'O', '3697']
[EX A]:
19468