One can use more than 2 decimal places for rates, but final invoicing has to be two decimal places (atleast in most countries). Banks/tax authorities dont carry

One can use more than 2 decimal places for rates, but final invoicing has to be two decimal places (atleast in most countries). Banks/tax authorities dont carry anything beyond 2 decimal. Eg: fuel is usually priced 3 decimal, so 4 gallons x 25.5444 usd/gallon gives = $102.1776 to 4 dp, but will be billed as $102.18