Add fields to my Open Source Shopping Cart

I need to add fields to an open source shopping cart called "Open Freeway" I? have integrated the shopping cart on my Joomla Website.? I need the fields added to the admin side and the front-end side.? The fields added would allow a user to pick between Adult Tickets which cost $20.00 and Student/Senior Tickets which cost $15.00. ## Deliverables 1) Add to attached jpg? "admin_screenshot"? ? - Adult Field with price ? - Student/Senior with price 2)Add to attached jpg "front_end_screenshot" ? -Select Adult with price and quantity option ? -Select Student/Senior with price and quantity option I am available for clarification.