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: ['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']

A: 41788
****
Q: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']

A: 41173
****
Q: ['1143', '8005', 's', 'X', '253']

A:
9401
****