#include <iostream>
#include <cstring>
#include <algorithm>

using namespace std;

int main()
{
    int T;
    cin >> T;
    while (T -- )
    {
        int a, b, c, d, e, f;
        cin >> a >> b >> c >> d >> e >> f;
        if (e >= f)
        {
            int x = min(a, d);
            int y = min({b, c, d - x});
            cout << x * e + y * f << endl;
        }
        else
        {
            int y = min({b, c, d});
            int x = min(a, d - y);
            cout << x * e + y * f << endl;
        }
    }
    return 0;
}