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: ['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']

A: 5708
****
Q: ['1073', 'i', 'o', 'j', 'O', 'g', 'X', '3261', '5105', '4831', 'J']

A: 14270
****
Q: ['5897', '6335']

A:
12232
****