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.

Example Input: ['o', 'L', 'E', 'V', 'D', 's', 'Z', 'm', 'a', '2785', 'I', 'v', 'B', '7909', '1599', 'V', 'N']
Example Output: 12293

Example Input: ['433', 'y', '2015', '5997', 'X', 'u', '9321', '8037', 'N', 'Z', 'E', '4645', '627', '6595', '7679']
Example Output: 45349

Example Input: ['G', 'M', 'G', 'q', '8151', '4351', 'D', 'E', 'f', 'N', '6497', 'Y', '1117', '7971', '5669', 'u', '9179', '8177']
Example Output:
51112