Those pesky ships

    I am in the process of setting up a spreadsheet to desing starships.
Well, actually I am done.  My problem is that all the numbers match up
fairly well (give or take some large errors) but I can refine that.  The
main problem is that the price is ALWAYS way too high.  I tested it using
desings from the manual and seeing if I got the same amount.  Unfortunately
not, any ideas where this might be going wrong, as in the designs in the
book are all off?  Just wondering if anyone else had this problem.

			                       Matt.