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]: ['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']
[EX A]: 28054

[EX Q]: ['3121', 'j']
[EX A]: 3121

[EX Q]: ['g', 'b', 'm']
[EX A]:
0