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]: ['1875', '9833', 'i', '7493', 'J', 'P', 'z']
[EX A]: 19201

[EX Q]: ['1073', 'i', 'o', 'j', 'O', 'g', 'X', '3261', '5105', '4831', 'J']
[EX A]: 14270

[EX Q]: ['3697', 'Z', '5733', 'd', '3305', 'Y', 'Y', '1945', '3125', '6571', '3159', 'B', 's', 'q']
[EX A]:
27535