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]: ['M', 'H', 'l', 'Y', '3811', '1953', '5869', 'U']
[A]: 11633


[Q]: ['8683', 'p', '47', '8983', 'g', 'u']
[A]: 17713


[Q]: ['I', '2215', 'C', 'I', '7653', '2823', '9213', 'i', 'd', 's', 'J', 'Q', '8717', '4785']
[A]:
35406