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]: ['1867', '5301', 'x', '3867', '8707', '2429', 'K', '59', '6629', 'v', 'A', 'y', 'P', '3829', '1979', 'R', '8481', '5767', 'h', 'U']
[A]: 48915


[Q]: ['t', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']
[A]: 21910


[Q]: ['4061', 'Z', '857', 'O', '5523', 'o', 'T', 'v', '8219', 'q', 'E', 'B', '5153', '7129']
[A]:
30942