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]: ['a', 'm', '3205', '1869', '1117', 'K', '5785']
[A]: 11976


[Q]: ['O', 'K', 's', 'V', '6815', 'c', '9277', 'V', '1783', 'b', 'i', '2045', 'E', 'E', '2035']
[A]: 21955


[Q]: ['y', '4549', '5713', 'u', 'K', 'v', 'm']
[A]:
10262