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]: ['V', 'h', '5549', 'K', 's', '8337', 'Y', '497', 'z', 'T', '4467', '6333', 'M', '1573', 'y', 'O', '5499', 's', 't', '6205']
[A]: 38460


[Q]: ['t', 'x', '5629', 'k', '2003', 'v', '541', 'l', 'v', '7983', '677', '6173', 'z', 'J', 's', 'u', '2187', 'Y']
[A]: 25193


[Q]: ['n', 'x', 'H', 'W', '5593', '723', '3967', '5927', '5527', '4043', '5201', 'q', '5893', '2619', 'b', 'd', 'U', 'Q', 'U']
[A]:
39493