Math Code for PDF/LifeCycle

I need? CODE (or Plugin)? forLifeCycle /Adobe Acrobat 9 ? that would let me easily configure fields mathematically. The? CODE? (or Plugin) would have the basic operators such as +,-,/,*, and the function sum(). The? CODE? (or Plugin) in would behave similar to the functionality of an excel spreadsheet while performing the above listed operators ans function. The? CODE? (or Plugin) must be capable of parsing information from multiple pages within a single PDF/LifeCycle and have the capacity of placing tie result on any one of the pages also within the PDF. As an example, I may want to add 3 numeric fields from page one, and also add 5 numeric fields from page 2, and then display the result in a fild that is located on page 3. The UI does not have to be large, however, must have a display where the fromula (configuration) can be viewed by the User. END