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: ['s', '9377', '3663', '1375', 'j', 'L', '7943', '1711', '7409', '9115', '1227', 'I', 'U']

A: 41820
****
Q: ['6019', '1467', '3415', '7785']

A: 18686
****
Q: ['9199', '8375']

A:
17574
****