"price"the literal text "price" (case sensitive) \s?optionally matches any whitespace character
:the literal : (5810 / 728 / 3A16)
\s?optionally matches any whitespace character
"the literal " (3410 / 428 / 2216)
Non-Capturing Group(?:\d+\.?)+ +repeats the group contents below at least once:
\d+a digit, repeated at least once
\.?optionally matches the literal . (4610 / 568 / 2E16)