Where did the "$" sign come from and what's the original meaning?

A man named Pollack made it up-it started as peso(mexican0used instead of carrying heavy coins~coins ripped pants pockets so paper seemed better

From wikipedia:

The origin of the "$" sign has been variously accounted for. Perhaps the most widely accepted explanation is that it is the result of the evolution of the Spanish and Mexican scribal abbreviation "ps" for pesos. This theory, derived from a study of late eighteenth- and early nineteenth-century manuscripts, explains that the s gradually came to be written over the p developing a close equivalent to the "$" mark."

(It's not U and S overlaid - the $ was in use prior to the formation of the United States)

i got told that is the U and S put together and in U.S LOL idk