It is important to note also that this product was not promoted at retail with discounted prices at any time during this period, so the variation is not due to consumers preferring to purchase a product when it was  on sale. 
( ( ( ( ( It ( is ( important ( to ( ( note also ) ( that ( ( this product ) ( ( was not ) ( ( ( promoted ( at ( retail ( with ( discounted prices ) ) ) ) ) ( at ( any time ) ) ) ( during ( this period ) ) ) ) ) ) ) ) ) ) ) , ) so ) ( ( the variation ) ( ( is not ) ( due ( to ( consumers ( preferring ( to ( ( purchase ( a product ) ) ( when ( it ( was ( on sale ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBZ is) (ADJP (JJ important) (S (VP (TO to) (VP (VB note) (ADVP (RB also)) (SBAR (IN that) (S (NP (DT this) (NN product)) (VP (VBD was) (RB not) (VP (VBN promoted) (PP (IN at) (NP (NP (JJ retail)) (PP (IN with) (NP (JJ discounted) (NNS prices))))) (PP (IN at) (NP (DT any) (NN time))) (PP (IN during) (NP (DT this) (NN period))))))))))))) (, ,) (IN so) (S (NP (DT the) (NN variation)) (VP (VBZ is) (RB not) (ADJP (JJ due) (PP (TO to) (NP (NP (NNS consumers)) (VP (VBG preferring) (S (VP (TO to) (VP (VB purchase) (NP (DT a) (NN product)) (SBAR (WHADVP (WRB when)) (S (NP (PRP it)) (VP (VBD was) (PP (IN on) (NP (NN sale))))))))))))))) (. .)))
Customers simply noticed the product more as our marketing kicked in.
( Customers ( simply ( ( noticed ( ( ( the product ) more ) ( as ( ( our marketing ) ( kicked in ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNS Customers)) (ADVP (RB simply)) (VP (VBD noticed) (PP (ADVP (NP (DT the) (NN product)) (RBR more)) (IN as) (NP (NP (PRP$ our) (NN marketing)) (VP (VBN kicked) (PP (IN in)))))) (. .)))