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: ['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

A: 31575
****
Q: ['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']

A: 32209
****
Q: ['6017', '1949', 'V', '7817', '5531', '6755', '3637', 'T', 'g', 'M', '5415', 'Z', '5981', 'G', 'G', 'z', '7481']

A:
50583
****