Information Technology Development Cycle Diary

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Today I set up the input, process and invoice screen according to the hand drawn plan and the functions and calculations according to “The Workbook” section.

I did not set-up any validation checks, macros or cell protection. I simply wanted to see if this section of the system would function correctly. 

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On the process sheet I had difficulty setting up the ‘Discount on spending’ cell. I used the formulae:



However this formula would not work and ...

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