To improve clarity to customers, would it be possible to show symbols for every monetary amount on every row, instead of only on the bottom-line totals? It would add to legibility if there were a $ sign, for example, before any numbers that represent dollars, to distinguish them better from number that represent quantities or hours.
Also, it’s jarring to most American eyes to see the label
US$ on an invoice from an American company. It also looks affected or plain odd. Just
$ is more normal-looking to us in general. Can this be an option?