Casio MH-10M Business Calculator — 10-Digit Display, Cost/Sell/Margin Keys! $9.00 CAD (55% Off)

Amazon.ca has the Casio MH-10M business calculator for $9.00 CAD, down from $19.99 — 55% off. Prime members ship free; otherwise orders over $35 ship free.

A 10-digit display with large keys, so you're less likely to fat-finger a row when you're adding up a column. The feature that actually separates it from a $5 no-name unit is the cost/sell/margin keys — quoting a job or working out gross margin takes two presses instead of reverse-engineering it on paper. Tax keys and a quick-correction key are there too, handy at tax time.

Solar powered with an LR44 backup battery included, so it mostly looks after itself on a desk. Compact footprint.

Rated 4.6 from 140+ reviews, ranked #2 in Basic Office Calculators, and 300+ sold in the past month. At nine dollars it undercuts most of the no-name units on the shelf.

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