Materials and supplies are expendable items that cost less than $5000 per unit (tangible, nonexpendable property having a useful life of more than one year and costing $5,000 or more per unit should be listed in your budget as equipment).
Provide a breakdown of the materials and supplies you need, a description of them, and why they are necessary in your budget justification. Also show how you calculated the cost of the items.
A note about computers: Only computers that are necessary for carrying out the work of the proposed project should be included in your budget (for example, a laptop for a grad student to use doing field work). Office computers should not be charged to a grant.