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: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']

A: 6860
****
Q: ['29', 'N', '5061', '7191', 'z', '8367']

A: 20648
****
Q: ['s', '4443', '2385', '1385', 'W', 'P', 'd', '8835', 'Y', '1715', '4495', 'V']

A:
23258
****