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, 5, ['b', 'u', '5279', '6945', '6631']

SOLUTION: 13576

PROBLEM: 3, 13, ['7259', '131', '4039', 'b', '9015', '9573', '8473', 'O', 's', '6851', 'N', 'E', '715', 'k', 'j', 'r', '9679', '9519', '5335', '383', 'A', 'd']

SOLUTION: 38666

PROBLEM: 4, 7, ['1783', '4159', '6241', 'Y', 'z', '9585', 'T', '8613', '5323', 'D', '3493', 'I']

SOLUTION:
9585