package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
)

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	testcase := func() {
		a := getNextInt64(scanner)
		b := getNextInt64(scanner)
		c := getNextInt64(scanner)
		x := getNextInt64(scanner)
		y := getNextInt64(scanner)
		z := getNextInt64(scanner)
		if a < c {
			ans := calc(a, b, c, x, y, z)
			if ans < int64(math.MaxInt64)>>1 {
				fmt.Fprintln(writer, ans)
				return
			}
			fmt.Fprintln(writer, -1)
			return
		}
		ans := calc(c, b, a, z, y, x)
		if ans < int64(math.MaxInt64)>>1 {
			fmt.Fprintln(writer, ans)
			return
		}
		fmt.Fprintln(writer, -1)
	}
	t := getNextInt(scanner)
	for t > 0 {
		testcase()
		t--
	}
}
func calc(a, b, c, x, y, z int64) int64 {
	if a < b && b > c && a != c {
		return 0
	}
	if a > b && b < c && a != c {
		return 0
	}
	if a == c {
		if a == 1 {
			return -1
		}
		if b > a {
			return min(x, z)
		}
		return min(x, z)*(a-(b-2)) + max(x, z)*(a-(b-1))
	}
	if a == 1 {
		if b == 2 {
			return -1
		}
		return z * (c - (b - 1))
	}
	if a+1 == b {
		return min(y*(b-(a-1)), z*(c-(b-1))+min(x, z))
	}
	return min(y*(b-(a-1)), z*(c-(b-1)))
}
func min(a, b int64) int64 {
	if a < b {
		return a
	}
	return b
}
func max(a, b int64) int64 {
	return -min(-a, -b)
}