ilo 0.8.2

-- 01: Simple function (terse syntax)

fn total
	price: number, quantity: number, rate: number -> number
	? price: 10, quantity: 2, rate: 0.2 == 24
	? price: 100, quantity: 1, rate: 0 == 100
	let sub = * price quantity
	let tax = * sub rate
	+ sub tax