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)+1):
        ai = a-i; bi = b-i; ci = c
        l = min(ai,bi,ci); j = min(bi-l,ci-l); k = min(ai-l,ci-l)
        if y+z<=w: ans = max(ans,x*i+y*j+z*k+w*l)
        elif z<=y>=w: ans = max(ans,x*i+y*min(bi,ci)+z*min(ai,ci-min(bi,ci)))
        elif y<=z>=w: ans = max(ans,x*i+y*min(bi,ci-min(ai,ci))+z*min(ai,ci))
        else: d = min(ci-j-k-l,l); ans = max(ans,x*i+y*(j+d)+z*(k+d)+w*(l-d))
    print(ans)