def cost102(a, b, c, x, y, z):
    ret = 0
    if c <= a:
        ret += (a-c+1)*x
        a = c-1
    if a <= b:
        ret += (b - a + 1) * y
        b = a-1
    if a<1 or b<1 or c<1:
        ret = 10**20
    return ret


def cost120(a, b, c, x, y, z):
    ret = 0
    if b <= a:
        ret += (a-b+1)*x
        a = b-1
    if a <= c:
        ret += (c - a + 1) * z
        c = a-1
    if a<1 or b<1 or c<1:
        ret = 10**20
    return ret


t = int(input())
for _ in range(t):
    a,b,c,x,y,z = map(int,input().split())
    cost = []
    cost.append(cost120(a, b, c, x, y, z))
    cost.append(cost120(c, b, a, z, y, x))
    cost.append(cost102(a, b, c, x, y, z))
    cost.append(cost102(c, b, a, z, y, x))
    if min(cost) == 10**20:
        print(-1)
    else:
        print(min(cost))