I am a 20 year old Computer Science student from the UK who has decided to do some freelance web development for a local company.

A description of the system would be an online website and reservation system. The intention is for the user to browse their online store and reserve items for collection.

The system has been developed using Java complimented by the Spring Framework and MySQL database. 
The content of the site is split across 7 pages that are available to the public. In addition to an Admin Panel/CMS which i've implemented so that the business can manage the site by them selves. This admin section consists of another 6-7 pages.

I have worked around 6-8 hours a day for a duration of about 4-6 weeks.
I calculated a price of around £900-1100 for the hours that i have worked at minimum wage around £5/hour.

I would like to know if this is a reasonable price for a system such as this one, or for the work that I have put into it. As this is my first, I am unsure whether this is over or under charging. Thanks