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#include<bits/stdc++.h>
using namespace std;

int main(){
    //freopen("ip.txt","r",stdin);
    int t;
    cin>>t;
    while (t--){
        int n;
        cin>>n;
        vector<int>v(n);
        int sum = 0;
        for (int i=0; i<n; i++){
            cin>>v[i];
            sum += v[i];
        }
        int min = v[0];
        for (int i=1; i<n; i++){
            if (v[i]<min){
                min = v[i];
            }
        }
        int x = sum - n*min;
        cout<<x;
        cout<<endl;
    }
    return 0;
}