If the difference between these two prices is large enough, the mailer could hire a trucking firm, as discussed above.
( ( If ( ( ( the difference ) ( between ( these ( two prices ) ) ) ) ( is ( large enough ) ) ) ) ( , ( ( the mailer ) ( ( could ( ( ( hire ( a ( trucking firm ) ) ) , ) ( as ( discussed above ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (DT the) (NN difference)) (PP (IN between) (NP (DT these) (CD two) (NNS prices)))) (VP (VBZ is) (ADJP (JJ large) (RB enough))))) (, ,) (NP (DT the) (NN mailer)) (VP (MD could) (VP (VB hire) (NP (DT a) (NN trucking) (NN firm)) (, ,) (SBAR (IN as) (S (VP (VBN discussed) (PP (IN above))))))) (. .)))
Regardless of price differences, the mailer could not hire a trucking firm.
( ( Regardless ( of ( price differences ) ) ) ( , ( ( the mailer ) ( ( ( could not ) ( hire ( a ( trucking firm ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Regardless) (PP (IN of) (NP (NN price) (NNS differences)))) (, ,) (NP (DT the) (NN mailer)) (VP (MD could) (RB not) (VP (VB hire) (NP (DT a) (NN trucking) (NN firm)))) (. .)))