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Levelling Spreadsheet.

Levelling Spreadsheet.

Levelling Spreadsheet.

(OP)
The contract I’m working on is entering a new phase, which calls for a lot of levelling to be done on 804 and black top levels.
Is there any spreadsheet available on the web where I can just enter the readings and the results are instantaneous? I tried looking myself on the net, but have made little success in finding anything.

If not how would one write the commands for linking the IS to the BS and FS and then do a change point?

This is an example of what i'm doing.                    
                    
    A      B      C      D      E
    
    2.000              12.000    10.000
         0.750         11.250
         0.360         11.640
    2.500      1.500   13.000    10.500
                    


Column A Back site.
Column B Intermediate
Column C Fore Site.
Column D Collimation H.P.C
Column E Reduced Level.


Col A is added to Col E to get Col D. Col B is the subtracted from Col D to get values for Col E.
At Col C there is a change point and Col C is subtracted from Col D to get a value in Col E.
Col E is then added to Col A (2.500) to get a new H.P.C. at Col D (13.000).
And it repeats itself again when you change position again.

What I want is to be able to write the code at the change points at and link in to the new value of the Col D.

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