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.

['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']
26791

['c', 'r', 'R', 'a', '6915', 'C', '3651', 'j', 'L', '9761', '2923', 'Z', 'e', '833', 'W', '1867', 'G', 'H', 'T']
25950

['8687', 'D', 'e', 'v', '2109', '4947', 'h', '2261', '5377', '8349', 'T', '487', '6503', 'E', 's', 'R', 'M']

38720