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', 'B', '8791', '3165', 'n', 'm']
[A]: 11956


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


[Q]: ['E', '2053', '5473', '6031', '6731', 'v', 'X', '8325', '1661', '8231', '6943', 'O', 'f', 'Y', 'i', '767', '5955', '6905', 'C', 'L']
[A]:
59075