Path: csiph.com!usenet.pasdenom.info!gegeweb.org!usenet-fr.net!nerim.net!novso.com!newsfeed.xs4all.nl!newsfeed4a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.091 X-Spam-Evidence: '*H*': 0.84; '*S*': 0.02; 'cents': 0.07; 'suppose': 0.07; 'think,': 0.07; 'subject:Help': 0.11; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'message-id:@mrabarnett.plus.com': 0.16; 'received:192.168.1.4': 0.16; 'subject:python': 0.16; 'wrote:': 0.18; '3.0': 0.19; 'print': 0.22; 'header:User-Agent:1': 0.23; 'replace': 0.24; 'second': 0.26; 'header:In-Reply-To:1': 0.27; 'subject:some': 0.31; 'problem': 0.35; 'subject:with': 0.35; 'no,': 0.35; 'but': 0.35; 'should': 0.36; 'starting': 0.37; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'skip:p 20': 0.39; "you're": 0.61; 'first': 0.61; 'here:': 0.62; 'costs': 0.63; 'for:': 0.64; 'total': 0.65; 'price': 0.69; 'price:': 0.78; '40%': 0.84; 'shipping,': 0.84; 'discount': 0.87; 'discounted': 0.95; 'wholesale': 0.96 X-CM-Score: 0.00 X-CNFS-Analysis: v=2.1 cv=eZmzft0H c=1 sm=1 tr=0 a=0nF1XD0wxitMEM03M9B4ZQ==:117 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=0Bzu9jTXAAAA:8 a=5FYZ9MsUIQAA:10 a=lYmbDxrgSswA:10 a=ihvODaAuJD4A:10 a=IkcTkHD0fZMA:10 a=EBOSESyhAAAA:8 a=IFej2vUWUj8A:10 a=ftVR_M1JgEfUn7HlW7gA:9 a=QEXdDO2ut3YA:10 X-AUTH: mrabarnett:2500 Date: Sun, 02 Feb 2014 16:38:57 +0000 From: MRAB User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: python-list@python.org Subject: Re: Help with some python homework... References: <02c4c69d-71f1-4a01-86df-d4d5a7ffb3f5@googlegroups.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 45 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1391359140 news.xs4all.nl 2861 [2001:888:2000:d::a6]:46327 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:65270 On 2014-02-02 16:11, David Hutto wrote: > price_per_book = 24.95 > discount = .40 > quantity = 60 > The original problem says: Suppose the cover price of a book is $24.95, but bookstores get a 40% discount. Shipping costs $3 for the first copy and 75 cents for each additional copy. What is the total wholesale cost for 60 copies? > Here: > discounted_price = (1-discount) * price_per_book > > The discounted price should be price_per_book - discount > No, the discount of 0.40 is 40%, not 40 cents. > shipping = 3.0 + (60 - 1) * .75 > shipping should be, I think, should be 3.0 + (quantity * .75) > No, the shipping is 75 cents starting from the second copy. > total_price = 60 * discounted_price + shipping > replace 60 with quantity (quantity * discounted_price) + shipping > > print total_price, 'Total price' > > total_price gives: > 945.45 Total price > and just 24.55(price per book - discount is ) * quantity is $1473 without the shipping, so the total is way off already: > > > I think the following is what you're looking for: > > price_per_book = 24.95 > discount = .40 > quantity = 60 > discounted_price = price_per_book-discount > shipping = 3.0 + (quantity*.75) > total_price = (quantity * discounted_price) + shipping > print 'Total price: $%d' % (total_price) > Total price: $1521 >