I think your code mostly works, I downloaded it and just modified the regular expression to this:

    # Expected formats
    # >>>A 430-08870 BKR PRINTING $ 1,090.00 $ 155.00 M 5 20 $ 1,035.5
+0 Mark Bengtzen 01/22/2020 (801) 532-5363<<<
    # >>>420-31784 GRAFIKSHOP CORP. DBA FALCON $ 945.00 $ 110.00 M 1 2
+0 $ 935.55 Mei-Ing Hoffman 01/22/2020 (713) 977-2555<<<
    if ( $line =~ m/^
         (?<Awd> \w \s+)?
         (?<ContractorCode> \d{3}-\d{5})           \s+
         (?<Name> \S [^\$]+)                       \s+
         \$ \s* (?<Amount> \S+)                    \s+
         \$ \s* (?<AddlRate> \S+ \s+ \w)           \s+
         (?<DiscountDays> \S+)                     \s+
         (?<DiscountPercent> \S+)                  \s+
         \$ \s* (?<DiscountPrice> \S+ )            \s+
         (?<Bidder> \w \D+ \S )                    \s+
         (?<DateReceived> \d\d\/\d\d\/\d{4} )      \s+
         (?<PhoneNum> [(]\d{3}[)] \s \d{3}-\d{4} )
         /x ) {
        say "Found Contractor '", $+{Name}, "' (", $+{ContractorCode},
+ ") and bidder '", $+{Bidder} , "' (", $+{DateReceived},")";
    } else {
        say "Failed to parse line: >>>", $line, "<<<";
    }
[download]

This works for all the rows (except headline) on https://contractorconnection.gpo.gov/abstract/746810