Component for joomla 3.4

Component for the currency exchange site.
The main tasks in the admin panel:
1. Add any number of input fields (e.g. buy USD, sell USD, buy EURO, sell EURO, etc.)
2. The output of any field in articles by tags such as {kurs=usd1} {kurs=euro1}

The main tasks from the front of the site:
1 input of values into fields created in the admin to a registered user with assigned rights
2 saving the entered values in the database on the mask [value - date - time ]
3 data entry must be done as in extensions.joomla.org/ext.
(entered under your admin login / appeared at the top right button with ticks and crosses - these are filled and not filled fields, tick by the number of added fields in the component / clicked on this button / pop-up with fields and save / filled in the necessary fields and pressed the save / values recorded in the database and changed on the site in tags {kurs=usd1} {kurs=euro1}