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: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']

A: 45451
****
Q: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']

A: 19001
****
Q: ['S', 'P', 'p', 'm', 'J', '5765', '8391', '5369', 'Z', '8557']

A:
28082
****