Personal financial planning web tool conversion to spreadsheet

Use this link as the source: http://goo.gl/zqiGO

The project objective is to create a version of the Baby Costs Calculator Tool which starts on this page

Please create an accessible spreadsheet format version that displays consistently in both Microsoft Excel and OpenOffice (available at OpenOffice.org)
Please maintain the look & feel of the Baby Costs Calculator Tool to a reasonable extent & where possible
Please create and add guidance copy to support the use of the tool by consumers with a wide range of technical skill

The Budget Planner example on this page: http://goo.gl/mIWzr is a reference for the usability of the spreadsheet version of the tool