import itertools
T=int(input())
inf=1<<60
for t in range(T):
    A,B,C,X,Y,Z=map(int,input().split())
    ans=inf
    for tpl in itertools.permutations(range(3)):
        if tpl[1]==1:
            continue
        ABC=[A,B,C]
        for i,j in zip(tpl,tpl[1:]):
            ABC[j]=min(ABC[j],ABC[i]-1)
        if min(ABC)>0:
            ans=min(ans,sum((a-aa)*x for a,aa,x in zip((A,B,C),ABC,(X,Y,Z))))
    if ans==inf:
        ans=-1
    print(ans)