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]: ['L', 'w', '2783', '6993', 'd', '9173']
[A]: 18949


[Q]: ['5215', 'c', '839', 'V']
[A]: 6054


[Q]: ['C', '6403', '4077', '9243', '3139', 'a', '8323', 'w', '2395', '6913', 'W', 'V', '1665', 'e', 'o', '9475', '8653', '8825', 'p', 'L']
[A]:
69111