calculating numbers per option

I’m re-designing an access 97 db to Access 2003 and adding a few changes. There are approximately 5-6 option buttons and each one will define a different part of a roof. Only one option button should be able, to be chosen at a time. For instance Valley, Ridge, Hip are the names of some the option buttons. For example: Lets say option button (Ridge) is chosen, the user will enter his numbers into text box 1 and into text box 2. For instance: (text box 1 he enters 23) + (text box 2 he enters 10) and hits enter, when the user hits enter these values that were entered into text box1 and into text box 2 will need to show in another box (maybe) a list box we’ll call it (item details box) and added together for a total. For instance (23 + 10 = 33) this is what should show up in the (item details box). Let’s say the user enters more values into text box 1 and text box 2 with the Ridge option box still chosen. Lets say he enters (10 into text box 1) + (20 into text box 2) (10 + 20 = 30) is what should show up in the (item details box). The item details box will show all the numbers of text box 1 and text box 2 and the total of the two, but it will only show the numbers for the option box that is chosen. This item details box will then have a total at the bottom of it that adds all the totals of each entry shown in it. For example: 23 + 10 = 33 10 + 20 = 30 Total = 63 Here is an example [login to view URL] After the user hits enter text box 1 and text box 2 will need to clear to either blank or zero waiting for another entry of numbers until the user has completed his input of numbers into the chosen option box in this case (Ridge). Then he will choose another option box and perform the same routine again. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform windows 2000,Xp,