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

A: 44566
****
Q: ['4601', '6021', '3005', 'I', 'f', '4631', 'Q', 'd', '8041', 'D', '8067', '7383', '757', 't', 'd', 'n', '2275', 'p', 'm', '6021']

A: 50802
****
Q: ['t', 'O', 'W', '7285', '8649', '3637', '8523', '8157', 'E']

A:
36251
****