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# Information Technology Development Cycle Diary

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Introduction

The Diary 19/02/2002 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. ...read more.

Middle

However this formula would not work and error messages came up. After looking at Microsoft help I realised my mistake. After the "Otherwise" comma in the formula another if function has to be used. ...read more.

Conclusion

To do this I added an IF function in front of the formulas in the cells. So the formulas changed (see next page). This meant if only one room was ordered the second row of the invoice table would be blank. ...read more.

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