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: ['3145', 'C', '7725', 'k', 'z']

A: 10870
****
Q: ['p', 'r', 'e', '9285', '1527', '9633', '7013', '587', 'x', 'v', 'p', '1811', 'i', 'f', 'M', '1087']

A:
30943
****