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]: ['d', '5571', '6455', '4287', 'I', 'U', 'M', '8303', '8893']
[A]: 33509


[Q]: ['9069', '8333', 'H', '2049', '8051', 'L', '2749', '8819', '2883', '9317', 'M', '6515']
[A]: 57785


[Q]: ['1761', 'y', 'M', '5865', '261', '109', 'v', 'P', 'e', '1503', '855', 'K', 'F', 'o', 'd', 's']
[A]:
10354