Guy; Take a look at the resource types in the resource sheet view. You can define different types of resources such as labor and materials. For material resources you can define additional information like cost per use. Once all the required resources (labor, material, etc.) are created they can be attached to project schedule tasks. How you organize the tasks will then control where the costs appear each month. There are also separate fields that track project labor versus material costs for example. Add these additional fields to your views/reports and you should be all set.