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: 16, 23, ['N', '3357', '919', '9963', 'u', '137', '5633', '2999', 't', '1583', '2217', 'p', '1087', '7219', '61', 'p', 'L', '5745', '4431', 'T', '4369', 'G', '1511', 'p', 'M', '4277', '6683', 'C', 'D']

SOLUTION: 16056

PROBLEM: 17, 22, ['4123', '6299', '2781', '759', 'f', 'A', 'X', '2549', 'K', '8119', '8725', 'e', 'I', 'S', '1429', 'd', '8051', 'Q', 'y', '1045', '763', 't', 'J', 'J', '169', 'b', '721']

SOLUTION: 9859

PROBLEM: 15, 16, ['3765', '4455', 'i', 'n', '9363', 'n', '1241', '7001', 'n', '6085', '6021', 'k', '2805', '2875', 'b', '483', '1083', 'r', 'S']

SOLUTION:
483