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: ['2913', 'b', 'j', '7591', 'O', 's', '5589', '4995', '7503', 'U', 'S', 'C', '6797']

A: 35388
****
Q: ['v', '4119', 'I', '475', 'd', 'L', '909', 'F', 'V', '775', 'k', 'A', '9411', '8383', 'W', '1521', 'z', 'j', '7057', 'I']

A: 32650
****
Q: ['U', 'R', '4297', 'Y', 'L', 'l', 'v', '6569', '791', '5053', '1073', '261', '7541', 'o', 'M']

A:
25585
****