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]: ['4271', 'N', 'M', '5239', '7037', 'x', 'U', 's', '7107', '4163', 'f', '3607', '6155']
[A]: 37579


[Q]: ['597', 'i', 'd', '3201', 'u', '1111', '8563', 'c', 'E', '5983', '6293']
[A]: 25748


[Q]: ['1195', 'M', '1005', '7297', 'R', 'V', '4137', '5891', 'W']
[A]:
19525