#include <bits/stdc++.h>
using namespace std;

#define int long long

int solve(int a, int b, int c, int x, int y){

    int ans = 0;

    if(b <= c){
        int num = (c+1)-b;
        if(a <= num || c <= num){
            return LLONG_MAX;
        }
        ans += num * y;
        a -= num;
        c -= num;
    }

    if(a <= b){
        int num = (b+1)-a;
        if(b <= num || c <= num){
            return LLONG_MAX;
        }
        ans += num * x;
    }

    return ans;
}

signed main(){
    int t;
    cin >> t;

    for(int i = 0;i < t;i++){
        int a, b, c, x, y, z;
        cin >> a >> b >> c >> x >> y >> z;

        int ans = min({solve(b, a, c, z, y), solve(b, c, a, z, x), solve(a, c, b, y, x), solve(c, a, b, x, y)});

        if(ans == LLONG_MAX){
            cout << -1 << endl;
        }else{
            cout << ans << endl;
        }
    }

    return 0;
}