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JavaScript JavaScript Basics (Retired) Working With Numbers Doing Math

Posted by LOUELLA LANDICHO
LOUELLA LANDICHO
1,196 Points

Did you use the / symbol to divide profit by quantity?

RE: Challenge Task 3 of 3

Can someone help to answer the question of the subject above. The error message and code is below.

ERROR: Did you use the / symbol to divide profit by quantity?

var wholesalePrice = 5.45;
var retailPrice = 9.99;
var quantity = 47;

var salesTotal = 9.99 * 47;

var profit = 213.38;

var profitPerUnit = 4.54;

Thank you,

Louella

script.js 
var wholesalePrice = 5.45;
var retailPrice = 9.99;
var quantity = 47;

var salesTotal = 9.99 * 47;

var profit = 213.38;

var profitPerUnit = 4.54;
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

4 Answers

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

It's unfortunate that the challenge was passing for you. You are not supposed to do the math yourself. You are supposed to use the variables they provided you to programmatically calculate the salesTotal, profit, and profitPerUnit:

var wholesalePrice = 5.45;
var retailPrice = 9.99;
var quantity = 47;

var salesTotal = retailPrice * quantity;
var profit = salesTotal - wholesalePrice * quantity;
var profitPerUnit = profit / quantity;
LOUELLA LANDICHO
LOUELLA LANDICHO
1,196 Points

Surprisingly the challenge was passing me. Hmm. But thanks for the review and input, Matt.

Andrey Misikhin
Andrey Misikhin
16,529 Points
Andrey Misikhin
Andrey Misikhin
16,529 Points

How did you calculate profitPerUnit = 4.54? I think you must calculate it by division.

var quantity = 47;
var profit = 213.38;
var profitPerUnit = profit  / quantity ;
LOUELLA LANDICHO
LOUELLA LANDICHO
1,196 Points

Thanks for looking the code, Andrey. Thanks for your help.

Efrain Vazquez
Efrain Vazquez
3,878 Points
Efrain Vazquez
Efrain Vazquez
3,878 Points

When we Divide, we cannot mix "Values with numbers? like this: var profitPerUnit = (profit) / 4.25 ;

Matthew Long
Matthew Long
28,407 Points
Matthew Long
Matthew Long
28,407 Points

Sure. You can. But it’s unadvised. In your example, many would refer to 4.25 as a magic number. Someone reading the code in the future doesn’t have much to go on as to where 4.25 came from.