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]: ['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']
[A]: 15293


[Q]: ['1869', 'q', '5919', 'D', '7733', '2641', 'h', '1327']
[A]: 19489


[Q]: ['g', '2277', '125', 'T', 'Y', 'o']
[A]:
2402