Slate: Calculator

Eight calculators on one chalk slate: percent, date, tip, loan, GST, exchange.

Slate is eight everyday calculators in one, dressed in chalk on a slate board: keys that click like they mean it, and everything you actually need, nothing you don't.EIGHT TOOLS, ONE KEYPAD• Calculator: basic for everyday sums; one tap opens the scientific keys: trig and inverses, logs, roots, powers, factorials, π and e, degrees or radians. Percent works the way desk calculators always have (50 + 10% is 55), an…