Carnival website jobber

...have the ability to add new items as well as thier cost at time of purchase. It will also need to keep a running total of what the item(s) have made to since the day of purchase. I already have an example to model after. In fact the only thing this program lacks is the ability to use the reports I already have developed and the inventory control functions I need it to have for my inflatable and carnival games. It already has a section for DJ systems. I would like it be as close to this in ease of use if not easier. It will also have to keep track of repeats and potential repeat customers. It will also have to be able to network between 4 computers. And due to the repeat failed attempts at this site to get it done, My time frame has narrowed greatly. I need this done in the ...