TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 4, 12, ['E', '6343', 'f', '541', '7361', '9993', 'g', '3185', 's', 'w', 'Q', 'I', 'e', 's']

SOLUTION: 21080

PROBLEM: 16, 29, ['1431', 'a', '7223', '5743', '4571', 'q', 'Z', '3415', '6237', '1537', '5403', 'Y', 'K', '1949', 'p', '2641', '3307', 'X', 'O', 'q', 'T', 'n', '845', '1489', '161', '8515', '8735', '5065', '4973', '9287']

SOLUTION: 35731

PROBLEM: 3, 9, ['3569', '8591', 'r', '9427', '7913', 'q', 'Z', '9523', 'L', '9035']

SOLUTION:
26863