Yeah this is a known issue and likely fixable, I just need a bit of freetime to give it a look :)

2019-09-22: 2.7.5 is now deployed which should address most of the issues with ranges

2019-10-06: I misunderstood part of the review, yes problems like "US $20" will be hard to handle, not the individual cases, but the fact that a lot of sites have their own unique versions of this and they have to practically be hard coded

2019-10-17: version 2.8.0 will be out soon (tm) and include support for some edge cases like 'US $' alongside a bigger feature. If you find other sites with special ways to display currencies do please email either the site or currency format to baizeydevelopment@gmail.com