Edit how product option prices are displayed

[Seedlings]

I am looking for the location as to where the option prices are displayed with either a + ($) or - ($)

Options with subtract price are shown with a minus symbol, but adding a price does not show. Can someone please tell me which file and section I could find this in?
Thank you!

[Seedlings]

I found the solution to this -- See image, as the text is apparently an external link!

[Basara]

Thank you for posting a solution