/^CVR\(10\)\s*=\s*(.*?),.*?SAUCE$/ =>
 
See if the current line matches the regular expression that:
 
^        : has at the beginning
CVF      : the characters "C", "V", "R", followed by
\(       : an open-parenthesis character (the escape character is necessary because we want Perl to consider its literal value)
10       : followed by the characters "1", "0", followed by
\)       : a close-parenthesis character (escaping is necessary because we want Perl to consider its literal value)
\s*      : followed by 0 or more occurrences of whitespace characters
=        : followed by the "=" character
\s*      : followed by 0 or more occurrences of whitespace characters
(.*?),   : followed by the shortest continuous sequence of characters that ends with
        the comma character (","); group and capture this shortest continuous
        sequence of characters in a variable called "$1". This "grouping and
        capturing" is achieved by the parentheses; note that they are not
        escaped here, because we want Perl to consider their special (and not literal) values here
.*?S     : followed by shortest continuous sequence of characters that is followed by the character "S"
AUCE     : followed by the characters "A", "U", "C", "E"
$        : thereby reaching the end of the line

(1)  The most well-known book on regexes is this one:
Mastering Regular Expressions, 3rd Ed by Jeffrey Friedl - 
Chapter 3: Overview of Regular Expressions Features and Flavors, Section "Lazy Quantifiers"
Chapter 4: The Mechanics of Expression Processing - entire chapter provides detailed information of backtracking, greediness and laziness
 
(2)  Jan Goyvaerts, the author of "Regular Expressions Cookbook", has a website on regular expressions, and he explains greediness/laziness over there:
http://www.regular-expressions.info/repeat.html
 
(3)  The online Perl documentation has a really good tutorial on regexes. The section "Matching Repetitions" explains this concept:
http://perldoc.perl.org/perlretut.html#Matching-repetitions