Wordpress Plugin Estimating Program

I would like to have an estimation calculator wordpress plugin. It is a simple project for developers; here is a plug in that is not close but does the similiar work as a an example

https://codecanyon.net/item/cost-calculator-wordpress-plugin/12778927

so, my page must ask for number of bedroom, bathroom, kitchen, enterance, laundry room; customer can input room number; after that; let say; there are two bedroom, 3 bathroom;

bedroom1: [x]*[y]
bedroom2: [x]*[y]

bathroom1: [x]*[y]
bathroom2: [x]*[y]
bathroom3: [x]*[y]

AREA CALCULATION: after entering all the data; input must be total squarefootage. This way; we know how many room they have, each room's area; plus total square footage; let say it is 500square foot in total; than if we charge $3 dollar/per sqft. total must be $750.

if you have any question please contact me. thanks

Requirements

wordpress, coding, html, php

examples:

http://www.calculator.com/pantaserv/construction/simpletile.cgi?units=Feet

Skills Required

Wordpress Plugin Plugins Html Php