import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < n; i++) {
            int a = sc.nextInt();
            int b = sc.nextInt();
            int c = sc.nextInt();
            int x = sc.nextInt();
            int y = sc.nextInt();
            int z = sc.nextInt();
            sb.append(getCount(a, x, b, y, c, z)).append("\n");
        }
        System.out.print(sb);
    }
    
    static long getCount(long a, long x, long b, long y, long c, long z) {
        long min = Long.MAX_VALUE;
        min = Math.min(min, getOrderCount(a, x, c, z, b, y));
        min = Math.min(min, getOrderCount(c, z, a, x, b, y));
        min = Math.min(min, getOrderCount(b, y, a, x, c, z));
        min = Math.min(min, getOrderCount(b, y, c, z, a, x));
        if (min == Long.MAX_VALUE) {
            return -1;
        } else {
            return min;
        }
    }
    
    static long getOrderCount(long a, long x, long b, long y, long c, long z) {
        long count = 0;
        if (a <= b) {
            count += (b - a + 1) * y;
            b = a - 1;
        }
        if (b <= c) {
            count += (c - b + 1) * z;
            c = b - 1;
        }
        if (c <= 0) {
            return Long.MAX_VALUE;
        } else {
            return count;
        }
    }
}