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]: ['p', 'V', '673', '8483', 'S']
[A]: 9156


[Q]: ['2871', '1337', '3771', '4671', 'l', '3785', 'V', 'z', 'R', 'u', '6097', 'R', '4297', 'd', '6339', 'Y', 'V', '5873', '7399']
[A]: 46440


[Q]: ['S', '9257', '6801', 'I', 'D', 'I', 'N', '453', 'u']
[A]:
16511