Function- description display style- fixed angled display auto turn-off- automatically turn off calculator. percent key- percent key double zero- double zero key. tax calculation- price with/without tax key. check & correct- allows you to review and correct previous entries. vat / sales tax- quickly add or remove local sales taxes from values. square root- mathematical function. grand total- sum all previous calculations in to a grand total. cost, sell, margin- great for sales staff allowing calculation the other value if you know sales price, cost price or margin. rounding- choose how to round up or round down calculations. memory- three memory keys.
Have you used
CITIZEN CALCULATORS CT-666N?