include[HTML_REMOVED]

include[HTML_REMOVED]

using namespace std;

int n,a,b,c,d,e,f;

int main()
{
cin>>n;

while(n--)
{
    int res=0;
    cin>>a>>b>>c>>d>>e>>f;
    if(e>=f)
    {
        int mini=min(a,d);
        res+=mini*e;
        d-=mini;

        mini=min(b,c);
        mini=min(mini,d);
        res+=mini*f;
    }
    else
    {
        int mini=min(b,c);
        mini=min(mini,d);
        res+=mini*f;
        d-=mini;

        mini=min(a,d);
        res+=mini*e;
    }

    cout<<res<<endl;
}
return 0;

}