E-CodeDepreciation schedule: SL, 200% DB, SYD — a TI-84 Plus CE program
DEPREC is a TI-BASIC program for the TI-84 Plus CE. Year-by-year depreciation and book value by straight line, 200% declining balance (switching to straight line when that is larger, never below salvage) or sum-of-the-years'-digits, with the totals.
What it asks for and what it shows
It asks for 3 values at its prompts, after you pick option 1 from its menu. In the example below it shows TOTAL D, END BV.
Example run
One of its oracle test cases: “straight line 50000 → 5000 over 5”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Menu | option 1 |
| Input 1 | 50000 |
| Input 2 | 5000 |
| Input 3 | 5 |
| The screen shows | |
TOTAL D= | 45000 |
END BV= | 5000 |
How it's checked
8 test cases, each checked against the textbook formula it uses. Replayed key by key on a virtual TI-84 Plus CE, they make 36 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Depreciation schedule: SL, 200% DB, SYD” (DEPREC).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
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All TI-84 Plus CE finance programs · All TI-84 Plus CE programs