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]: ['Z', '6245', 'N', '1403', 'b']
[A]: 7648


[Q]: ['1969', 'm', 'Y', 'N', '7331', 'J', 'b', '2485', 'x']
[A]: 11785


[Q]: ['2355', 'S', 'm', 'k', '2543', '2297', '7075', '8487', 'R', 'G', '1951', 'E', 'o', '1413']
[A]:
26121