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.

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

[EX Q]: ['8109', '5635', 'u', 'M', '1009']
[EX A]: 14753

[EX Q]: ['8941', '7679', '5001', '3225', 'I', 'a', 'G', 'W', '9055', 'z', 'Z', 'j']
[EX A]:
33901