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: ['9069', '8333', 'H', '2049', '8051', 'L', '2749', '8819', '2883', '9317', 'M', '6515']

A: 57785
****
Q: ['d', '7305', '8903', 'b', '7687', '6393', '6939']

A: 37227
****
Q: ['2959', 'I']

A:
2959
****