How can I modify the Powershell script in two more scenarios

I would like to modify the Powershell script in these further 2 scenarios.

What changes in the source data is this.

Scenario 1:

BEG*00*SA*1234567**20140917<NL>  
The PO number here is the 1234567

PO1**240*CA***UN*123456789456*VN*12345*IN*456789<NL>
CTP**UCP*23.4<NL>
The amount is 240, the UPC is the 123456789456 and the Price is the 23.40

Scenario 2:
BEG*00*SA*7894561236**20140918<NL>
The PO is 7894561236

PO1**70*CA***UK*12345678912345<NL>
CTP**UCP*19.95<NL>
The amount is 70, the UPC is 12345678912345, and the Price is 19.95

How can I modify the script further to accommodate for each of these scenarios.
100questionsAsked:
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SubsunCommented:
Is price is coming in very next line of PO1 line?
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100questionsAuthor Commented:
Yes, from the CTP line, in both cases.
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SubsunCommented:
Once more info needed, Do you have a PID line this in this input file? If yes does it comes after CTP line?
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100questionsAuthor Commented:
Yes, thanks for catching that, I had omitted it.  It comes after the CTP line and it looks like this:

Scenario 1:
PO1**240*CA***UN*123456789456*VN*12345*IN*456789<NL>
CTP**UCP*23.4<NL>
PID*F****DESCRIPTION GOES HERE<NL>


Scenario 2:
PO1**70*CA***UK*12345678912345<NL>
CTP**UCP*19.95<NL>
PID*F*08***DESCRIPTION GOES HERE<NL>
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SubsunCommented:
Try this code and see if you get expected output..
$InputFile = "C:\original.txt"
$OutputFile = "C:\New.txt"

 Function ParseText ($OutputFile,$InputFile){
 Begin{
             $line,$poline,$totline,$total,$i = $null,$null,$null,$null,0
             Set-Content $OutputFile $null
             $Data = Get-Content -Path $InputFile | ?{$_ -match "(BEG\*)|(PO1\*)|(CTP\*)|(PID\*)|(EFG\*)"}
       }
 Process{
       $Data | % {
       #Check the end of data set
             If ($_ -match "EFG\*"){
                   If($poline -ne $null -and $total -ne $null){
                         $Totline = "Total: `$$Total"
                         Write-host "This is Total `$$total"
                         #Write the data collection to output file
                         "$poline$line`r`n$totline`r`n" | out-file $OutputFile -Encoding UTF8 -Append
                         #reset the variables
                         $line,$poline,$totline,$total,$i = $null,$null,$null,$null,0
                   }
             }
             #Collect the PO Number
             If($_ -match "(SA\*)(\d{3,10})"){
                   $poline = "PONumber: $($Matches[2])"
             }
             #Collect  G80 details and following G81 Description
             If($_ -match "(PO1\*{1,})(\d{1,})\*\w{2}\*{1,}\w{2}\*(\d{1,})"){
						 $count = $Matches[2]
						 $UPC = $Matches[3]
						 }
						 If($_ -match "(CTP\*{1,}).*\*(\d{1,}(\.\d{1,})?)"){
                   $i++
                   $total += [double]$count * [double]$Matches[2]
                   $Desc = $Data[([Array]::IndexOf($Data,$_)+1)] -Replace "PID\*\w\*{1,}(\d+\*{1,})?|<NL>"
                   [String[]]$line += "`r`nItem $i`: UPC: $UPC, Desc: $Desc, Qty: $count Price  `$$($Matches[2])"
             }
       }
  }
 }

 If(Test-Path $InputFile){
  ParseText $OutputFile $InputFile
 }

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