#include <bits/stdc++.h>
using namespace std;
using ll = long long;

void solve(){
    ll ans = 0, w;
    vector<ll> a(3), b(3), c(3);
    for(auto &&v : a) cin >> v;
    for(auto &&v : b) cin >> v;
    cin >> w;
    vector<pair<int,int>> pa = {{0, 1}, {1, 2}, {2, 0}};
    int u, v;
    auto f = [&](){
        ll r = min(a[0], a[1]);
        r = min(r, a[2]);
        for(ll i = 0; i <= r; i++){
            do{
                ll tmp = i * w;
                for(int j = 0; j < 3; j++) c[j] = a[j];
                for(int j = 0; j < 3; j++){
                    tie(u, v) = pa[j];
                    ll d = min(c[u], c[v]);
                    c[u] -= d, c[v] -= d;
                    tmp += d * b[u];
                }
                ans = max(ans, tmp);
            }while(next_permutation(pa.begin(), pa.end()));
            a[0]--, a[1]--, a[2]--;
        }
    };
    f();
    cout << ans << '\n';
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T;
    cin >> T;
    while(T--) solve();
}