import sys
input = sys.stdin.readline

T=int(input())
for tests in range(T):
    A0,B0,C0=map(int,input().split())
    X,Y,Z,W=map(int,input().split())
    LANS=0

    # Wを使う回数で全探索
    for i in range(min(A0,B0,C0)+1):
        ANS=i*W
        A=A0-i
        B=B0-i
        C=C0-i

        # Xを使う回数で三分探索
        MIN=0
        MAX=min(A,B)

        while MAX>MIN+3:
            mid1=MIN+(MAX-MIN)//3
            mid2=MIN+(MAX-MIN)//3*2

            ANS1=ANS+mid1*X
            A1=A-mid1
            B1=B-mid1
            C1=C

            ANS11=ANS1+min(B1,C1)*Y
            ANS11+=min(A1,C1-min(B1,C1))*Z

            ANS12=ANS1+min(A1,C1)*Z
            ANS12+=min(B1,C1-min(A1,C1))*Y

            ANS2=ANS+mid2*X
            A1=A-mid2
            B1=B-mid2
            C1=C

            ANS21=ANS2+min(B1,C1)*Y
            ANS21+=min(A1,C1-min(B1,C1))*Z

            ANS22=ANS1+min(A1,C1)*Z
            ANS22+=min(B1,C1-min(A1,C1))*Y

            if max(ANS11,ANS12)>max(ANS21,ANS22):
                MAX=mid2
            else:
                MIN=mid1

        #print(i,MIN,MAX)

        for j in range(MIN,MAX+1):
            ANS1=ANS+j*X
            A1=A-j
            B1=B-j
            C1=C

            ANS11=ANS1+min(B1,C1)*Y
            ANS11+=min(A1,C1-min(B1,C1))*Z

            ANS12=ANS1+min(A1,C1)*Z
            ANS12+=min(B1,C1-min(A1,C1))*Y

            LANS=max(LANS,ANS11,ANS12)

    print(LANS)