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]: ['I', '7815']
[A]: 7815


[Q]: ['2237', '2597', '2593', 'Y', '5345', 'g', 'l', 'I', 'p', 'u', 'L', 'T', '617', '9759', 'b', 'w', '7097', '9863']
[A]: 40108


[Q]: ['x', '7361', '687', '1497', 'n', '7213', '3913', 'x']
[A]:
20671