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.
--------
Question: ['339', 'h', 'd', '7449', 'e', 'u', '5055', '7029', '9009', 'G', 'U', '3', '441', '3273', 'K', '3827', '7069', 'x']

Answer: 43494


Question: ['T', 'n', '8513', '5565', '6343', '1403', '975', '6959', '8049', '1601', 'j', 'Q', 'O', '7889', 'r', 'D', '1903', '6607']

Answer: 55807


Question: ['8463', '3679', '909', 'S', '1801', 'A', '9787', '2657', 'O', '1541', '8317', 'd', 'B', 'w']

Answer:
37154