Smart Bookkeeper – Handheld Calculator SmartBookkeepe.ca • Series HHC-01 ☼ Light 0 GST % TAX % MC MR M+ M− AC C ± ÷ % √ ⌫ × 7 8 9 − 4 5 6 + 1 2 3 = 0 . +GST +TAX Calculator Demo Video