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]: ['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']
[A]: 36146


[Q]: ['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']
[A]: 33713


[Q]: ['2307', 'v', 'L', '1237', 'O', 'H', '7015', '2851', 'b']
[A]:
13410