  Let $G$ be a finite additive abelian group with exponent $d^kn, d,n>1,$ and
$k$ a positive integer. For $S$ a sequence over $G$ and
$A=\{1,2,\ldots,d^kn-1\}\setminus\{d^kn/d^i:i\in[1,k]\}, $ we investigate the
lower bound of the number $N_{A,0}(S)$, which denotes the number of
$A$-weighted zero-sum subsequences of $S.$ In particular, we prove that
$N_{A,0}(S)\ge 2^{|S|-D_A(G)+1},$ where $D_A(G)$ is the $A$-weighted Davenport
Constant. We also characterize the structures of the extremal sequences for
which equality holds for some groups.
