inf = 10**30
# b > c > a 
def calc1(a,b,c,x,y,z):

    count = 0
    if b <= c:
        count += (c-b+1)*z
        c = b-1
    if a >= c:
        count += (a-c+1)*x
        a = c-1
    if a > 0:
        return count
    return inf

# c > a > b
def calc2(a,b,c,x,y,z):
   
    count = 0
    if a >= c:
        count += (a-c+1)*x
        a = c-1
    if b >= a:
        count += (b-a+1)*y
        b = a-1
    if b > 0:
        return count
    return inf

t = int(input())
for _ in range(t):
    a,b,c,x,y,z = map(int,input().split())

    ans = min(calc1(a,b,c,x,y,z),calc2(a,b,c,x,y,z),calc1(c,b,a,z,y,x),calc2(c,b,a,z,y,x))
    if ans == inf:
        ans = -1
    print(ans)