T = int(input())

for i in range(T):

    A,B,C,X,Y,Z = map(int,input().split())

    ans = float("inf")

    #A>C>B

    na = A
    nc = min(A-1,C)
    nb = min(nc-1,B)

    if min(na,nb,nc) > 0:
        ans = min(ans, (A-na)*X + (B-nb)*Y + (C-nc)*Z)

    #B>C>A
    nb = B
    nc = min(B-1,C)
    na = min(nc-1,A)

    if min(na,nb,nc) > 0:
        ans = min(ans, (A-na)*X + (B-nb)*Y + (C-nc)*Z)


    t = A
    A = C
    C = t
    s = X
    X = Z
    Z = s

    #A>C>B

    na = A
    nc = min(A-1,C)
    nb = min(nc-1,B)

    if min(na,nb,nc) > 0:
        ans = min(ans, (A-na)*X + (B-nb)*Y + (C-nc)*Z)
    #B>C>A
    nb = B
    nc = min(B-1,C)
    na = min(nc-1,A)

    if min(na,nb,nc) > 0:
        ans = min(ans, (A-na)*X + (B-nb)*Y + (C-nc)*Z)


    if ans == float("inf"):
        print (-1)
    else:
        print (ans)