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: 2, 15, ['l', '5597', 'M', 'l', '6065', '7949', 'e', '433', '8159', 'N', 'Z', '5597', 's', 'k', '6973', '8387', 'n', 'W', '9895']

SOLUTION: 40773

PROBLEM: 3, 4, ['6811', '2637', '7177', '8715', 'T', 'c', '7901', '2693', '4739', '8949', '4609']

SOLUTION:
15892