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]: ['7771', 'g']
[EX A]: 7771

[EX Q]: ['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']
[EX A]: 5708

[EX Q]: ['Z', '1405', 'L', 't', '9437', '5301', 'L', '2383', 'w', 'g', 'd', 'T', 'b', 'E', '1191', 'Y', 'g']
[EX A]:
19717