#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int t,a,b,c,d,e,f;
int main()
{
cin >> t;
while(t--)
{
cin >> a >> b >> c >> d >> e >> f;
if(e>f)
{
cout << min(a,d)*e+ min(b,min(c,max(0,d-a)))*f << endl;
}
else
{
cout << min(b,min(c,d))*f+min(a,max(0,d-(min(b,min(c,d)))))*e << endl;
}
}
return 0;
}