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]: ['o', 'a', 'K', '6031']
[A]: 6031


[Q]: ['8755', 'A', '2893', '6703']
[A]: 18351


[Q]: ['1147', 'f']
[A]:
1147