Datexx 2-Line TrackBack Business Large Desktop Calculator， DD-7722<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>2 -line alphanumeric LCD display which shows past entries</li><li>Trackback up to 1，000 entries to help verification and make corrections</li><li>Determine profit， sales， and cost clearly and easily with the dedicated functionality</li><li>Quickly take taxes into consideration with the tax inclusion and exclusion keys</li></ul></div><img src="http://ecx.images-amazon.com/images/I/510ITUbLFwL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51sLVhpiIpL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51NDLVpGprL.jpg" noproxy>