Find the lexicographically smallest order of N numbers such that the total of N numbers <= Threshold value

Question

GIven a number N, Threshold T and an array A. Find the lexicographically smallest order of N numbers from A such that the total of these N numbers is <= T.

This question is a simplification of this dynamic programming question:

It’s Tushar’s birthday today and he has N friends. Friends are numbered [0, 1, 2, …., N-1] and i-th friend have a positive strength S(i). Today being his birthday, his friends have planned to give him birthday bombs (kicks :P). Tushar’s friends know Tushar’s pain bearing limit and would hit accordingly. If Tushar’s resistance is denoted by R (>=0) then find the lexicographically smallest order of friends to kick Tushar so that the cumulative kick strength (sum of the strengths of friends who kicks) doesn’t exceed his resistance capacity and total no. of kicks hit are maximum. Also note that each friend can kick unlimited number of times (If a friend hits x times, his strength will be counted x times)

Example:

R = 11, S = [6,8,5,4,7] Ans = [0,2]

Clearly, the maximum number of kicks = R/ min_element(S) = 11/4 = 2

So the question reduces to find the lexicographic smallest order of 2 elements in the Array such that the total of N elements is less than or equal to 11.

I am having a tough time thinking about a solution for this. Any leads/ ideas would be appreciated!