Javascript? Travel Budget Calculator Required for Website

Hi there, I would like to have someone create a small calculator for my website. I believe Javascript and HTML skill set is required. I will attach an excel file, so that you can review but basically the visitor will enter how much they want to spend and how many days they are on vacation. Then they will pick and choose the different categories that apply to their trip and fill in an amount (either a one time cost or a daily cost). On Click "calculate" button, the calculator should [add up all the one time costs] and then [multiply each category cost by the number of daysand then add up each total]. The total of all the one time costs should be added to the result of [multiply each category cost by the number of days and then add up each total]. The final result should be displayed in box "Projection - Your Trip will Cost:" * Result should be displayed with $ symbol In the "Difference" box, the result should display: the difference between "How Much do you want to spend on this Trip?" and "Projection - Your Trip will Cost:" * Result should be displayed as + or - with $ symbol. EXAMPLE: - $300.00 if negative or + $300.00 if positive If the result is Positive, then in box "Are You On Budget?" a "YES" should be displayed If the result is Negative, then in box "Are You On Budget?" a "NO" should be displayed Take a look at the format attached (I don't have formulas in there) and let me know if you have questions.