#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i, j, k, sisa=0, anak, kue, potongan[100][100], min = 0, total[100];
    scanf("%d", &kue);
    for(i=0; i<kue; i++){
        scanf("%d", &anak);
        for(j=0; j<anak; j++){
            scanf("%d", &potongan[i][j]);
            if(potongan[i][j] < min || min == 0)
                min = potongan[i][j];
        }
        total[i] = 0;
        for(j=0; j<anak; j++)
            total[i] += potongan[i][j] - min;
        min = 0;
    }
    for (i=0; i<kue; i++)
        printf("%d\n", total[i]);
    return 0;
}