I could not remember

Rules Project

I could not remember the rule about whether to place the period inside or outside the parenthesis, so I found the answer at the following website:
     http://www.grammarbook.com/punctuation/parens.asp  

According to this website, the period goes outside the parenthesis when the information within parenthesis is adding detail.  The example from the website was "I expect five hundred dollars ($500).

Periods are supposed to be inside parenthesis only if the entire sentence is inside parenthesis. An example would be the following:   (Eat lots of fruit and you will have nice skin.)