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]: ['1693', '9237', '7591', '1593', 'R', '6295', '9379']
[EX A]: 35788

[EX Q]: ['M', 'H', 'l', 'Y', '3811', '1953', '5869', 'U']
[EX A]: 11633

[EX Q]: ['P', '7939', 'V', 'Q']
[EX A]:
7939