正则表达式在两个字符串之间查找字符串，不包括外部字符串

I know this has been asked a thousand times before, but I could not get any of the previous solutions working for my case. I'm trying to use Regex in Javascript to parse a text file. The bit I'm trying to extract is the monetary figure, with a format like 55,555.00. The numbers of digits here can vary throughout the text file. Additionally, the boundary characters and spaces can vary.I know this has been asked a thousand times bef