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How can I add various strings that appear in a text file?

I would like a script to look at a text file, line by line, and where it finds the following strings, it should add the amount which immediately follows.

A sample of what part of the lines might look like are the following.

..
..
LO1**540*CA*45.0500** etc..
..
LO1**200*CA*27.1200**etc..
..

Whenever the script sees a line which starts with LO1, it should then take the number that follows the two ** and then multiply it by the next number which appears in the line.  In the above case, the first line would be 540*45.05.. and so forth for every line.

The resulting data should be the total of all the multiplied lines in a new text file, which perhaps shows the first line of data which was found in the file, and then maybe on the second line, it should show the total.

For instance, the contents of the new text could be..

contents of the first line in the file
Total Dollar Value:   $29751.00
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100questions
Asked:
100questions
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1 Solution
 
100questionsAuthor Commented:
Currently, I am able to look through the file and find the lines which have the data, however I am not able to do any calculations with the data.

I use something similar to this batch file.

pushd "C:\Data"
if exist *.txt findstr /c:"LO1**" *.txt >>NewData.txt || del NewData.txt
popd

The output is something that looks like this..

Original.txt:LO1**200*CA*20.01**ABC*~
Original.txt:LO1**1*CA*7.52**ABC*~
Original.txt:LO1**10*CA*1.50**ABC*~
Original.txt:LO1**2*CA*1.50**ABC*~

This is not enough however, I need more, as I need to be able to use the data and get totals, as outline in my initial email above.

Any assistance is appreciated.
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oBdACommented:
Calculations in batch can be cone, but are somewhat limited, especially when it's not with integers.
Would you mind Powershell in this case?
$InputFile = "C:\Data\original.txt"
$OutputFile = "C:\Data\NewData.txt"
[double]$Total = 0
($Input = Get-Content -Path $InputFile) | ? {$_ -match "^LO1"} | % {
	$Columns = $_.Split("*")
	$Total += ([double]$Columns[2]) * [double]($Columns[4])
}
$Input[0], ("Total Dollar Value: {0:C}" -f $Total) | Set-Content -Path $OutputFile -Encoding UTF8
Get-Content -Path $OutputFile

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100questionsAuthor Commented:
PowerShell may not be the best option, however I can try.  It's s Windows 8 os.
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oBdACommented:
In case you haven't worked with PS yet, basically the first thing you need to do is open a PS console and enter (you have tab completion for commands and most arguments)
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

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You can set that for the machine if the console is started elevated; just leave out the "-Scope CurrentUser", default is "LocalMachine".
More information about this is available using
Get-Help about_Execution_Policies -ShowWindow

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Note that unlike batch, if you're in the console, you always need to add the path to the script; so even if you're in the script's folder, use ".\SomeScript.ps1". This is for security reasons and due to the fact that in PS, the current "drive" can come from providers other than the file system (for example HKLM:). Details in
Get-Help about_Command_Precedence -ShowWindow

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Granted Powershell takes some getting used to, but Microsoft did a really good job with it.
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100questionsAuthor Commented:
Should I try this first and then I can ask for a Powershell script?
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oBdACommented:
Should I try this first and then I can ask for a Powershell script?
Sorry, you've lost me.
The script in http:#a40313752 is a Powershell script. Save it as Whatever.ps1 (adjusting the file names, if required), for example in C:\Data.
Then open a Powershell console, and enter (copy and paste will work)
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser -Force

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Then enter (you can use the good old "cd" as well, which is an alias for Set-Location)
Set-Location C:\Data

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Finally, to start the script, just enter
.\Whatever.ps1

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100questionsAuthor Commented:
Thanks.  Can I call the script from within a regular .bat file?
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oBdACommented:
Sure; this assumes that the batch script and the ps script are in the same folder (this sets the execution policy only for the execution of the script):
set PSFile=%~dp0Whatever.ps1
PowerShell.exe -ExecutionPolicy Bypass -Command "& '%PSFile%'"

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100questionsAuthor Commented:
And when it performs the function of the powershell script will it continue with the rest of the bat file?
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oBdACommented:
Yep; just like (most) other calls to external programs.
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