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.

Q: ['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']

A: 37574
****
Q: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']

A: 41173
****
Q: ['6945', 'u', '3963', '8681', 'C']

A:
19589
****