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]: ['29', 'N', '5061', '7191', 'z', '8367']
[A]: 20648

[Q]: ['1815', 'U', '869', 's', '1847', 'C', '2711', 'S', 'i', '7949', '4477', '5093', 'D', '8661', '3835', '4087', '73', 'V', '3149', 's']
[A]: 44566

[Q]: ['7697', 'g', '3673', '1345', '461', '7865', 'm', '3821', 'a', '6645', '9439']
[A]:
40946