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: ['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']

A: 50667
****
Q: ['3433', '6955', 'Q', 'E', '3557', 'S', '2931', '9879', 'S', 'f', 'Q']

A: 26755
****
Q: ['7689', '5697', '3033', '6009', 'o', 'y', 'Y', 'G', '8913', '1973', '1573', '5375', '6739']

A:
47001
****