Texas Instruments TI15TK Financial Calculator Teacher Kit
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<b>[Product Information]</b><br>
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<li>Large keys are grouped and color coded by related functions</li>
<li>Plastic keys  are tamper proof</li>
<li>ANYLITE solar power - Operates in low light</li>
<li>Appropriate for math grades K-3</li>
<li>Negative sign appears to the left of the number displayed</li>
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