2 page php Website calclulates time and cost of an activity

Simple Php 2 page program that accumulated total cost and time of an activity over different timespans. This will be a simple 2 page program. One page 1 take variables On page 2 variables from page 1 are used to calculate cost of activity over time. They are displayed on a page. Program will calculates time and cost of an activity over various timespans (ie. months, year, etc... ). Then it'll calculate how much time is saved if an activity's time is reduced by a certain percentage. Already created a program that calculates the time and cost of an activity but I want the program changed so it works on 2 pages as I described. You can see the program at: [login to view URL] Coding should be structured and modular, possibly object oriented and use standard naming conventions. Actually, I'll give you variable names if you're selected. Right now the focus is on programming without hard coding to text fields. To test the program create simple text fields on html page. Pass fields to 2nd page to display answers. Feel free to ask questions you have. Please send your time and cost estimate. The work is programming for hire. And I retain and gain rights to all work done. You must be willing to answer questions about your work. And get the app installed and working correctly on my website. I've created a few method-names and method signatures that'll make it modular. Can you add a debug_flag that, if turned on, writes requests and parameters to a log? PHP 5.5.30 This quick job is just the start. Later, there will be another to save and retrieve data from a database. If interested then leave your time and cost estimate.