T = int(input())

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

    u = min(a,b,c)
    ans = 0
    for i in range(u + 1):
        tmp = i * w
        A = a - i
        B = b - i
        C = c - i

        k = min(A,B)
        tt = k * x
        if k == A:
            tt += min(B - k,C) * y
        else:
            tt += min(A - k,C) * z
        if tmp + tt > ans:
            ans = tmp + tt
        k = min(B,C)
        tt = k * y
        if k == B:
            tt += min(A,C - k) * z
        else:
            tt += min(A,B - k) * x
        if tmp + tt > ans:
            ans = tmp + tt
        k = min(A,C)
        tt = k * z
        if k == A:
            tt += min(B,C - k) * y
        else:
            tt += min(A - k,B) * x
        if tmp + tt > ans:
            ans = tmp + tt
    print(ans)