Fare Estimator

For a developer to understand my point as to what i want please check this fare calculator how this limo company got it set [login to view URL] thats what i want but it has to function 100% with no errors i want this to be done based on new technology Ajax, newest php, PDO or msqli newest support sql database since the mysql sooner or later wont be supported but i do need one for web and mobile friendly so it has to be fully responsive. The fare for price calculating has to have this One Way Transfer Minimum Fare Price per Mile Prive Per minute 10% to include for service charge and also an option for customer to pick if he/she wants to tip 10%, 15%, 20% and hit submit but i want it like this website has it not same look of course not but the same functions its all ajax and i really love ajax saves time and is much faster process. I also need an billing dashboard that works with database so i do have a template ready so the developer just has to move tabs around and only apply to what i need to add to my account so there is no design required for this expect some line of php code and security. Admin or Manager needs to have fully access to everything For Dashboard Be able to change calculator settings Charge per mile, minute, percentage % and other things that i might add some extra stuff but i want it to work this way so later in future i can easily change the price if i need to. It has to have payment option stripe, braintree, paypal and few other things i will explain more (REMOVED BY FREELANCER.COM ADMIN) better so the developer can better understand how i picture this idea in my head. I will go with the best price because at the same time i am fresh at this business got a lot more to do so my hands are tight on the money but for starter this is very important to my website so if you work with me on the price and i like your work i will definitely keep you as my main developer guy for updates, maintenance and everything else that has to do with web developing. Got to start small first before i get to the top.