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]: ['6731', 'f', '4561', '5601', 'i']
[A]: 16893


[Q]: ['m', 'g', '7251', '5873', '59', '7345']
[A]: 20528


[Q]: ['G', '9141', '5673']
[A]:
14814