What is the correct budget code to include shelving, supplies and materials or equipment?
It depends on the unit cost of the shelving. Items with a unit cost of $5,000 or more go in the Equipment budget code (code 20). Items with a unit cost of less than $5,000 go into Supplies and Materials (code 45). Most shelving has a unit cost well below $5,000, therefore it would go in the Supplies and Materials budget code.