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: 6, 10, ['5601', '3783', '7919', '9195', 'G', 'J', 'L', 'X', 'O', 'F', '2479', 's', 'H', '5353', '7079', '2199', '2937', 'S']

SOLUTION: 0

PROBLEM: 5, 6, ['6675', '1045', '5697', '8385', 'R', '8979', '2187', 'L', 'w', '9711', 'e', '9789', 'f', 'c', 'C', '8189', '131', '8163']

SOLUTION:
8979