Chapter 4. Creating the Global Settings Layout
The Global Settings layout serves two functions. First, it’s where you’ll enter all the constants that will be used in calculations. When we defined these fields in Chapter 2, we made them global—meaning that they were intended to store a single value for the database, rather than a different value for each record. You’ll use these fields to record the IRS mileage rate for the current year (Mileage Rate), current year (Year), length of your default trip (Mileage Increment), and odometer readings at the start and end of the year (Start Mileage and End Mileage).
Second, a variety of calculations are performed on this layout. You can switch to this layout whenever you want to check the business miles ...
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