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: ['Y', '9053', 'N', '6921']

A: 15974
****
Q: ['6723', '1', '6357', '1497', 'A', 'p', 'N', 'T']

A: 14578
****
Q: ['9259', '9185', '7955']

A:
26399
****