#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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MwoxNSAyIDMKNSAxMAo3IDUgMgoxMCAxMgoxIDEwMCAxMDAKMTAwIDEwMAo=

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5 10
7 5 2
10 12
1 100 100
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