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]: ['f', 'N', '8597', 't', 'K', '9755', 'j', '9747', '7259', '5493', 'n', '7269', '8493', '2279', '5369', 'f']
[A]: 64261


[Q]: ['4701', 'b', 'i', 'B', 'z', '7837', 'W']
[A]: 12538


[Q]: ['K', '1201', '1295', '277', '4545', '147', '7401', '9379', 'A', 'n', 'r', 'N', 'U', 's', 'L', '501', 's']
[A]:
24746