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: 7, 16, ['l', '1165', '8087', 'M', '6269', '6349', 'R', 'm', 'j', '9437', '3875', 'n', 'R', 'Y', '4427', 'g', '6231', 'm', '1139', '3891', '3773', '1303', 'Y', '7347']

SOLUTION: 17739

PROBLEM: 2, 21, ['7753', '4315', '7527', 'R', 'W', 'a', '3983', 'w', 'F', '8967', 's', 'Y', 'D', 'I', '5305', '2535', 'u', '135', 'M', 'D', 'G', 't', 'r', 'g', 'W', 'V', '3461', 'P', 'T', 'd']

SOLUTION: 32767

PROBLEM: 9, 18, ['K', 'h', '5031', '6439', '2939', 'Z', 'X', 'v', 'y', 'T', 'm', '1909', '4663', 'f', 'j', '1315', 'M', 'v', 'Q', '6147', 'G', '8607', 'U', 'o', '8921']

SOLUTION:
7887