t = int(input())
abc = [[int(i) for i in input().split()] for j in range(t)]


for i in range(t):
    ans = 10**19
    a,b,c = abc[i][:3]
    x,y,z = abc[i][3:]
    #aがmax
    if a > 2:
        tmp = 0
        A,B,C = a,b,c
        if a <= c:
            tmp += abs(a-1-c)*z
            C = a-1
        if C <= b:
            if C - 1 <= 0:
                tmp += 10**19
            tmp += abs(C-1-b)*y
        
        ans = min(ans,tmp)

    #bがmax
    if b > 2:
        tmp = 0
        A,B,C = a,b,c
        if B <= A:
            tmp += abs(B-1-A)*x
            A = B-1
        if A <= C:
            if A - 1 <= 0:
                tmp += 10**19
            tmp += abs(A-1-c)*z
        ans = min(tmp,ans)
        #print(tmp,"tmp",i)
        tmp = 0
        A,B,C = a,b,c
        if B <= C:
            tmp += abs(B-1-C)*z
            C = B-1
        if C <= A:
            if C - 1 <= 0:
                tmp += 10**19
            tmp += abs(C-1-A)*x
        ans = min(tmp,ans)

    if c > 2:
        #cがmax
        tmp = 0
        A,B,C = a,b,c
        if c <= a:
            tmp += abs(c-1-a)*x
            A = c-1
        
        if A <= b:
            if A - 1 <= 0:
                tmp += 10**19
            tmp += abs(A-1-b)*y
        #print(A,b,"aaab",tmp)

        ans = min(tmp,ans)
    if ans != 10**19:
        print(ans)
    else:
        print(-1)