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: ['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']

Answer: 36146


Question: ['l', '2511', '2071', 'o', 'F', '7583', '1909', '1859', '3299', '3853', 'h', 'P', 'P', '9175', 'B', 'F']

Answer: 32260


Question: ['2275', '3815', '2309', '803', 'c', 'b', 'y', 'n', '4421', '479', 'q', 'V', '6087', 'S', 'D', '5663', '2083', 'Z']

Answer:
27935