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: ['4997', '5005', '6773', 'q', 'K', '8391', '7303', 'K', 'N', '5417', '8573', 'z', '8653', '8343', 'm', 'L', '1587', 'p', '5323']

A: 70365
****
Q: ['T', '721', '6555', 'g', 'y', 'U', '3053', 'A', '9663']

A: 19992
****
Q: ['3887', 'C', '6111', 'L', 'e', 'X']

A:
9998
****