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]: ['6347', '5495', '169', '9503', 'H', '571', '6105', 'X', 'r', 'e', '7369', 'a', 'd', '6999']
[A]: 42558


[Q]: ['4159', 'H', 'h', 'W', 'w', 'i', 'G', 'l', 'j', '5467', '9219', 'j', 'q', 'n', '5465', '6197', 'J', 'y']
[A]: 30507


[Q]: ['9783', '433', '9967', '3743', '9905', '3759', '335', 'P', 'd', '9925', 'd', '5209', '2685', '4585', '7129', '1899', '6655', 'n', '6099']
[A]:
82111