#include <bits/stdc++.h>
using namespace std;
int main() {
int t; cin>>t;
while(t--){
int b,p,f,h,c,money1=0,money2=0;
cin>>b>>p>>f;
cin>>h>>c;
int bb=b,pp=p,ff=f,hh=h,cc=c;
if(b>p || b>f){
money1 += h*p;
b = b-2*p;
if(b>2*f){
money1 += c*f;
}
else{
b=b/2;
money1 += b*f;
}
money2 += cc*ff;
bb = bb-2*ff;
if(bb>2*pp){
money2 += hh*pp;
}
else{
bb=bb/2;
money2 += bb*hh;
}}
(money1<money2)?cout<<money1<<endl:cout<<money2<<endl;
}
}
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