Calculator of plumbing works for the site order No. 69

Script for calculating the cost of plumbing work for the site.

========= Features

- Real-time calculation when selecting or changing an item.
- Ability to change prices and item names in HTML code.
- Clean and simple design
- Pure HTML5, CSS3, Javascript
- Doesn´t require jQuery
- Clean and valid markup
- The source code is correctly formatted and commented
- Main supported browsers
- Easy to install, configure, and styles
- The attached documentation for installation and configuration

========= Calculation parameters of the calculator

Pipe laying from polypropylene x / g
Installing a water meter
Installing the bath
Sink installation
The installation of the toilet

========= Calculation formula:

The cost of plumbing work = laying of pipes from propylene + counter number*on list price + bath + toilet + wash basin