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: ['d', '7305', '8903', 'b', '7687', '6393', '6939']

Answer: 37227


Question: ['7497', '5041', '3839', '8187', 'h', '1993', 'c', '8733', 'l', 'L', '147', 'F', 'T', '6093', 'K', 'V', '2781']

Answer:
44311