3-Line Solar Desktop Calculator with Cost, Selling Price & Margin: R

"¢ 8 digits with large, easy-to-read display & 3-digit comma markers "¢ Time, tax & change calculations "¢ Independent memory "¢ Profit margin % "¢ Change sign (+ / -) "¢ Key rollover "¢ Auto power off after 6 min "¢ Solar plus power with battery backup