Needs more jQuery!

Question

Inspired by this site, this question could potentially be a doozie. People on StackOverflow often overuse jQuery as an answer. Therefore, we need a way to recognize programmatically if a code snippet uses jQuery.

Given a string (which may or may not contain new lines,) of valid Javascript, determine if jQuery is used.

You determine if jQuery is used if the $ or jQuery functions are called.

Input quirks:

• Input will always be valid Javascript.
• Input can contain new lines.
• Input can omit a semicolon where it would automatically be inserted
• There will always be only one argument to the jQuery function.
• Dollar signs could exist elsewhere (strings, comments) so be careful.
• No base64 conversion functions will/can be used in input.
• No eval will/can be used in input.
• Any referenced variable or function can be assumed to be defined, but will be guaranteed not to produce errors.
• Code snippets will always produce either a truthy or a falsey value, there will be no ambiguous code.
• Comments can exist in either form.

Rules:

• No Standard Loopholes
• This is code-golf, the shortest answer wins.
• You must write a program or a function that takes a string as input and returns a truthy value if it uses jQuery, and a falsey value if it does not.
• If someone can provide a valid input that breaks your code or causes it to return an incorrect value, it is not a winning answer.

Example Test cases:

include, but are not limited to:

$('div') // true

console.log("$5.99"); // false

$ += 3; // false, the `$` variable clearly has a different value type here

var a = "span" /* this is a comment */
$(a).each(function(){
 jQuery(this);
}); // true

Good luck, and remember, everything's better with a little extra jQuery!

Answer 1

Javascript - 52 byte * .9 * .8 = 37.44

Don't know how valid this is, because it redefines $ and jQuery and evals the input to check if it was called.

(x)=>{$=jQuery=()=>alert(1)&3();eval(x+";alert(0)")}