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: ['P', '6299', '9655', 'l', '6317', '2139', '3347', 'l', '3095', '7363', '3115', '7529', 'R']

Answer: 48859


Question: ['s', '3881', 'l', '5271', '9227', 'Z', '5429', '7691', '6127', '6301', '8533', 'T', '233', 'j', '1685', 'F', 'b', '3797', '6633', '7917']

Answer: 72725


Question: ['s', 'v', 'n', '6735', 'E', 'w', 'K', 'Z', 'a', '5791', 'w', 'j', '5471', '7851', '4905', '6383', 'W', '7095', 'e']

Answer:
44231