import sys
input = sys.stdin.readline

T = int(input())
for _ in range(T):
    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):
        now = W * i
        tA, tB, tC = A - i, B - i, C - i
        now += X * min(tA, tB)
        tA, tB = A - min(A, B), B - min(A, B)
        if tA:
            now += Z * min(tA, tC)
        else:
            now += Y * min(tB, tC)
        ans = max(now, ans)
        
        now = W * i
        tA, tB, tC = A - i, B - i, C - i
        now += Y * min(tB, tC)
        tB, tC = B - min(B, C), C - min(B, C)
        if tB:
            now += X * min(tA, tB)
        else:
            now += Z * min(tA, tC)
        ans = max(now, ans)
        
        now = W * i
        tA, tB, tC = A - i, B - i, C - i
        now += Z * min(tA, tC)
        tA, tC = A - min(A, C), C - min(A, C)
        if tA:
            now += X * min(tA, tB)
        else:
            now += Y * min(tB, tC)
        ans = max(now, ans)
        
    print(ans)