from sys import stdin
input = stdin.readline

def func(a, b, c, ab, ac):
    ans = 0
    if ab < ac:
        b, c = c, b
        ab, ac = ac, ab
    MIN = min(a, b)
    a -= MIN
    b -= MIN
    ans += MIN*ab
    MIN = min(a, c)
    a -= MIN
    c -= MIN
    ans += MIN*ac
    return ans

for _ in range(int(input())):
    A, B, C = map(int, input().split())
    X, Y, Z, W = map(int, input().split())

    ans = 0
    for i in range(min(A, B, C)+1):
        a, b, c = A-i, B-i, C-i
        SUM = W*i
        if i <= 1:
            for j in range(min(a, b)+1):
                d, e, f = a-j, b-j, c
                SUM2 = SUM+X*j
                if Z <= Y:
                    MIN = min(e, f)
                    e -= MIN
                    f -= MIN
                    SUM2 += Y*MIN
                    MIN = min(d, f)
                    d -= MIN
                    f -= MIN
                    SUM2 += Z*MIN
                else:
                    MIN = min(d, f)
                    d -= MIN
                    f -= MIN
                    SUM2 += Z*MIN
                    MIN = min(e, f)
                    e -= MIN
                    f -= MIN
                    SUM2 += Y*MIN
                ans = max(ans, SUM2)
        else:
            ans = max(ans, SUM+max(func(a, b, c, X, Z), func(b, a, c, X, Y), func(c, a, b, Z, Y)))

    print(ans)