def calc(a,b,c,x,y,z):

    ret = 0
    ba = a
    bb = b
    bc = c
    if max(x,y,z) == x:
        for i in range(min(a,b)+1):
            count = i*x
            a,b,c = ba,bb,bc
            if z >= y:
                count += z * min(a-i,c)
                c -= min(a-i,c)
                count += y * min(b-i,c)
            else:
                count += y * min(b-i,c)
                c -= min(b-i,c)
                count += z * min(a-i,c)
            ret = max(ret,count)

    elif max(x,y,z) == y:
        for i in range(min(b,c)+1):
            count = i*y
            a,b,c = ba,bb,bc
            if z >= x:
                count += z * min(c-i,a)
                a -= min(c-i,a)
                count += x * min(b-i,a)
            else:
                count += x * min(b-i,a)
                a -= min(b-i,a)
                count += z * min(c-i,a)
            ret = max(ret,count)

    else:
        for i in range(min(a,c)+1):
            count = i*z
            a,b,c = ba,bb,bc
            if y >= x:
                count += y * min(c-i,b)
                b -= min(c-i,b)
                count += x * min(a-i,b)
            else:
                count += x * min(a-i,b)
                b -= min(a-i,b)
                count += y * min(c-i,b)
            ret = max(ret,count)

    return ret


def calc2(a,b,c,x,y,z):

    count = 0

    ## ab
    for i in range(min(a,b)+1):

        ## ac
        for j in range(c+1):

            if i+j > a:
                break

            num = i * x + j * z
            num += min(b-i,c-j)*y
            count = max(count,num)
    return count

def solve():
    a,b,c = map(int,input().split())
    x,y,z,w = map(int,input().split())

    
    ans = 0

    if max(x,y,z) >= w:

        ans = max(ans,calc(a,b,c,x,y,z))

    elif x+y+z >= 2*w:
        ans = max(ans,calc(a,b,c,x,y,z))
        if a*b*c:
            ans = max(ans,calc(a-1,b-1,c-1,x,y,z) + w)


    else:
        mi = min(a,b,c)
        base = 0
        if mi > 5:
            base += (mi-5)*w
            a -= mi-5
            b -= mi-5
            c -= mi-5
        
        base += calc2(a,b,c,x,y,z)

        ans = max(ans,base)
    
    print(ans)

t = int(input())
for _ in range(t):
    solve()