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General The cost of water is usually made up of two parts: the cost of water by volume and the cost of sewerage by volume which is often related directly to the amount of water used. There is often a sewerage volume allowance which reduces the sewerage volume to allow for the fact that not all water used goes down the drain. Hovering over the various data boxes with the mouse will show the Tool Tips which give information as to what the box is for and what the data limits are if it is for data entry. Entering invalid data will cause an error message to be displayed explaining what data is wrong. These errors must be resolved before the calculate function will work. Use the tab key to move sequentially between data boxes or the mouse pointer to select individual boxes. See Data Limits for the limits used by the program. If the savings are negative the savings results are shown in orange. To work out just just the running cost of an item without taking into account purchase price, set Cost to 0 (or leave it empty). The program will work with data in either or both of Item 1 and Item 2. Whilst the water volume cost is required, the sewerage volume cost and sewerage volume allowance are optional and can be set to 0 or left blank if required. If the sewerage Volume Charge is set to zero or blank then the Volume Allowance must also be 0 or blank. The Notes box is used to add short notes to make sense of saved calculations at a later date and record other useful data. The Payback Period is used to spread the Item Cost over a specified period. For real examples of using the program look at the Log File and to see how the results are calculated click on Formulae. Currency & Date Format Volume Units Water Data Values Inflation Logging |
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