#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <limits>
#include <time.h>
#include <set>
#include <cmath>
using namespace std;
//#define mycom
#ifdef mycom
#include <fstream>
ifstream fin("input");
#else
#define fin cin
#endif
using namespace std;
int main()
{
int casenumber;
fin >> casenumber;
for(int i=1; i<=casenumber; i++)
{
int headnumber;
fin >> headnumber;
vector<int> s;
for(int j=1; j<=headnumber; j++)
{
int temp;
fin >> temp;
s.push_back(temp);
}
int nmin = numeric_limits<int>::max();
for(vector<int>::iterator iter = s.begin(); iter != s.end(); ++iter)
{
int sum = 0;
for(vector<int>::iterator iter2 = s.begin(); iter2 != s.end(); ++iter2)
{
sum += abs(*iter - *iter2);
}
nmin = min(sum, nmin);
}
cout << nmin << endl;
}
return 0;
}