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]: ['7755', '8383', 'y', 'k', '4869', '2809']
[A]: 23816


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


[Q]: ['G', 'Y', '7067', 'T', '1623', '211', 'T', '7665', 'E']
[A]:
16566