Casio MH-10M Business Calculator — Solar-Powered Desk Calculator! $9.00 CAD (55% Off)

Amazon.ca currently has the Casio MH-10M Business Calculator for $9.00 CAD (list $19.99, 55% off). Prime members ship free; non-Prime orders over $35 CAD ship free.

It's a compact desktop calculator with a large 10-digit display and big keys, so you're less likely to fat-finger a number. The cost/sell/margin keys let you work out pricing directly instead of doing it backwards on paper, and there are dedicated tax and quick-correction keys for HST math.

It runs on solar power with an LR44 backup battery, so as long as there's light it keeps going. The plastic body is small enough to drop in a drawer or tuck into a corner of the counter. It currently ranks near the top of Amazon's basic office calculator category, with a steady 4.6 rating.

At $9 it's roughly half off, and it usually hovers around $15 — an easy one to grab without overthinking.

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