// #define DEBUGGING
#include <bits/stdc++.h>
#define endl '\n'
#define ALL(V) (V).begin(), (V).end()
#define ALLR(V) (V).rbegin(), (V).rend()
using ll = std::int64_t;
using ull = std::uint64_t;
using PLL = std::pair<ll, ll>;
using TLL = std::tuple<ll, ll, ll>;
template <typename T> using V = std::vector<T>;
template <typename T> using VV = V<V<T>>;
template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return std::min(t, var_min(tail...)); }
template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return std::max(t, var_max(tail...)); }
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }
template <typename T> const T& clamp(const T &t, const T &low, const T &high) { return std::max(low, std::min(high, t)); }
template <typename T> void chclamp(T &t, const T &low, const T &high) { return t = clamp(t, low, high); }
namespace init__ { struct InitIO { InitIO() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << std::fixed << std::setprecision(30); } } init_io; }
#define mv_rec make_v(init, tail...)
template <typename T> T make_v(T init) { return init; }
template <typename T, typename... Tail> auto make_v(T init, size_t s, Tail... tail) { return V<decltype(mv_rec)>(s, mv_rec); }
#undef mv_rec
using namespace std;

#ifdef DEBUGGING
#include "../../debug/debug.cpp"
#else
#define DEBUG(...) 0
#define DEBUG_SEPARATOR_LINE 0
#endif

bool check(ll a, ll b, ll c) {
    if (a == b || b == c || c == a) return false;
    if (min(a, c) < b && b < max(a, c)) return false;
    return true;
}

const ll inf = 5e18;

ll solve() {
    ll a, b, c, x, y, z;
    cin >> a >> b >> c >> x >> y >> z;
    if (check(a, b, c)) return 0;
    ll cost = inf;
    auto calc = [&](ll na, ll nb, ll nc) {
        ll ret = 0;
        ll ca = max<ll>(0, na - a);
        ll cb = max<ll>(0, nb - b);
        ll cc = max<ll>(0, nc - c);
        if (c <= ca + cb) return inf;
        if (b <= ca + cc) return inf;
        if (a <= cb + cc) return inf;
        ret += ca * y;
        ret += cb * z;
        ret += cc * x;
        DEBUG(na, nb, nc, ca, cb, cc, ret);
        return ret;
    };

    // a is min
    {
        ll na = a;
        ll nc = max(c, na + 1);
        ll nb = max(b, nc + 1);
        chmin(cost, calc(na, nb, nc));
    }

    // b is min
    {
        ll nb = b;
        {
            ll na = max(a, nb + 1);
            ll nc = max(c, na + 1);
            chmin(cost, calc(na, nb, nc));
        }
        {
            ll nc = max(c, nb + 1);
            ll na = max(a, nc + 1);
            chmin(cost, calc(na, nb, nc));
        }
    }

    // c is min
    {
        ll nc = c;
        ll na = max(a, nc + 1);
        ll nb = max(b, na + 1);
        chmin(cost, calc(na, nb, nc));
    }
    return (cost == inf ? -1 : cost);
}

int main() {
    ll T;
    cin >> T;
    while (T--) cout << solve() << endl;
    return 0;
}