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.

['D', '1259', '8927', '3345', '553', '7209', '2507', 'l', 'o', '7317', '1227', '6749', 'S', '3171', 'I', '197', '9577', 'j', 'Q']
52038

['m', '4645', '711', 'l', '5085', '8989', '2387', 'n', 'V', '1613', '4011', '3261', 'p', 'X', '349', 'e']
31051

['j', 'B', '5953', '5249', '1215', '5409', 'Q', '747', '4815', '5825', '205', 'i', 'S', 'y', '9849', 'P', 't', 'z']

39267