Database / Cash Register

Im looking to create a site for my employee’s to login and use it as a cash register. It pretty simple just adding a few formulas and calculating our products. Also I want to have the ability to prepare a cheque for me so we can print for our customers. I have everything in detailed and I need this project quick. Also just a simple administration database for admins to keep track of the sales, and what our employees are buying. I will provide more details on the bidders.. Thank you