#include <bits/stdc++.h>

using namespace std;

using int64 = long long;
const int mod = 1e9 + 7;
// const int mod = 998244353;

const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;

struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;


template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {
  os << p.first << " " << p.second;
  return os;
}

template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}

template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    os << v[i] << (i + 1 != v.size() ? " " : "");
  }
  return os;
}

template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
  for(T &in : v) is >> in;
  return is;
}

template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}

template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}

template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}

template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}

template< typename F >
struct FixPoint : F {
  FixPoint(F &&f) : F(forward< F >(f)) {}

  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};

template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}

int main() {
  int T;
  cin >> T;


  // a < b < c


  auto F = [](int64 a, int64 b, int64 c, int64 x, int64 y, int64 z) {
    int64 pa = a, pb = b, pc = c;

    int64 ret = 0;

    int64 v = a + 1;
    v = max(v, b);

    ret += (v - b) * y;
    pa -= (v - b);
    pc -= (v - b);
    b = v;


    v = b + 1;
    v = max(v, c);
    ret += (v - c) * z;
    pa -= (v - c);
    pb -= (v - c);
    c = v;

    if(pa <= 0 || pb <= 0 || pc <= 0) return infll;
    return ret;
  };
  while(T--) {
    int64 A, B, C, X, Y, Z;
    cin >> A >> B >> C >> Z >> X >> Y;
    // {2,1,3}
    // {3,1,2}
    // {1,3,2}
    // {2,3,1}
    auto ret = min({F(B, A, C, Y, X, Z), F(B, C, A, Y, Z, X), F(A, C, B, X, Z, Y), F(C, A, B, Z, X, Y)});
    if(ret >= infll) ret = -1;
    cout << ret << endl;

  }
}