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: ['R', 'I', 'f', 'K', 'p', '8579', 'e', '1223', 'I', 'K', '8311', '2147', '4241', 'z', '6671', 'r']

A: 31172
****
Q: ['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']

A: 20070
****
Q: ['Q', '2133']

A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
2133
****
