#include <bits/stdc++.h>
using namespace std;
#define FOR(i,m,n) for(int i=(m);i<(n);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
using ll = long long;
constexpr int INF = 0x3f3f3f3f;
constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL;
constexpr double EPS = 1e-8;
constexpr int MOD = 998244353;
// constexpr int MOD = 1000000007;
constexpr int DY4[]{1, 0, -1, 0}, DX4[]{0, -1, 0, 1};
constexpr int DY8[]{1, 1, 0, -1, -1, -1, 0, 1};
constexpr int DX8[]{0, -1, -1, -1, 0, 1, 1, 1};
template <typename T, typename U>
inline bool chmax(T& a, U b) { return a < b ? (a = b, true) : false; }
template <typename T, typename U>
inline bool chmin(T& a, U b) { return a > b ? (a = b, true) : false; }
struct IOSetup {
  IOSetup() {
    std::cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);
    std::cout << fixed << setprecision(20);
  }
} iosetup;

void solve() {
  int a, b, c; ll x, y, z, w; cin >> a >> b >> c >> x >> y >> z >> w;
  ll ans = 0;
  for (int d = 0; d <= a && d <= b; ++d) {
    // イチゴ味: A - D 個 Z 円
    // メロン味: B - D 個 Y 円
    // 3色: D 個 W - X 円
    array<pair<ll, int>, 3> v{make_pair(z, a - d), make_pair(y, b - d), make_pair(w - x, d)};
    ranges::sort(v, greater<ll>{}, &pair<ll, int>::first);
    ll sale = x * d;
    int rem = c;
    for (const auto& [price, num] : v) {
      if (price > 0) {
        const int use = min(num, rem);
        sale += price * use;
        rem -= use;
      }
    }
    chmax(ans, sale);
  }
  cout << ans << '\n';
}

int main() {
  int t; cin >> t;
  while (t--) solve();
  return 0;
}