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.

['V', 'h', '5549', 'K', 's', '8337', 'Y', '497', 'z', 'T', '4467', '6333', 'M', '1573', 'y', 'O', '5499', 's', 't', '6205']
38460

['7361', '6913', '3605', '2081', '7619']
27579

['D', '8311', '1435', '8709', '2853', '153', '2621', 'l', 'h', '5871', '5797', 'x', '9391', '3239', 'x', '1973', 'K']

50353