#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define srt(v) sort(v.begin(), v.end())
#define rsrt(v) sort(v.rbegin(), v.rend())
#define pb push_back

void solve(){
    ll n, k; cin >> n >> k;
    vector<ll>v(n);
    for(int i=0; i<n; i++){
        cin >> v[i];
    }
    sort(v.begin(), v.end());
    ll sum=0;
    for(int i=0; i<k; i++){
        sum+=v[i];
    }
    cout << sum << endl;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t; cin >> t;
    while(t--){
        solve();
    }
}