| Year of introduction | 1998 |
| Function | Education |
| Model Number | 3058 |
| Power | 2 LR-43 batteries |
| Original Price | $44.95 |
| Photo credit | Mark Bollman→ |
GradeMatic 4000
| Year of introduction | 1998 |
| Function | Education |
| Model Number | 3058 |
| Power | 2 LR-43 batteries |
| Original Price | $44.95 |
| Photo credit | Mark Bollman→ |
CI's most recent grade calculator, the GradeMatic 4000 adds a timer to the features of the GradeMatic 3000, and so returns to the feature set of the GradeMatic 100 and 200.
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