Inventory Receipt Ruby on Rails -github (comment)

I need to create an inventory list as an invoice with a button on a show page. You will work on my github folder that contains my ruby on rails app. You will access to the app as administrator and you will need to go to the dash board where you can see a list of contracts. When you go on the show page of the contract you will have a list of inventory item. I want to be able to generate a .pdf as receipt for this list from a button on this page. The invoice must contain LOGO with the address of the provider (just let me know where to change) name and address of the customer the invoice will contain the following column of the table Transaction [login to view URL] | [login to view URL] ! [login to view URL] | transaction.Committed_Value |