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: ['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']

Answer: 27231


Question: ['2683', '4431']

Answer: 7114


Question: ['2037', 'Z', 'T', '6991', '5361', '1569', '4713', 'l', '8651', 'Q', '5603', '7529', '9401', '5241', 'E']

Answer:
57096