Select Statement/Schema/Pain-In-The-@ss Problem

I have a table that stores pass information for coils in a steel mill. For each coil stored, I have a field that has the number of passes made, and then fields for the width and gauge of steel for each pass. (ie, it has pass1gauge, pass1feet, pass2gauge, pass2feet, etc. up to a max of 9 passes ... table was in place and in heavy usage long before I got here, so don't blame me for the problems with the schema ... :)

I need to, in SQL, calculate the weight of the coil (width*last pass gauge*(last pass feet*12)*.283). I know from the pass field how many passes were made, and in VB, I could bring down the recordset, loop through the recordset and calculate this by checking the pass field, but there has to be a way to do this in SQL.

The gist of my problem is I need to, if its a 5 pass coil, do calculations with pass5gauge and pass5feet. Maybe I could do a join back on the same table? But ... well I'm not too experienced with SQL. :confused:

Anyone see how to do this? I can give a crap-ton of more details if needed. I am an admin (the only admin, as a matter of fact) of this db server, so I can do anything needed (ie, stored procedures for testing, views, whatever). I'd like to be able to avoid stored procedures, though, if possible.