creating a resource in ms project

Hi,

We are a Construction company and recently we started using MS project.

We have created three resources cement, sand and aggregates.

Now we want to create a fourth resource named RCC whose unit is CMT which uses cement, sand and aggregates in following weightage;

1.  8 bags of cement

2.  0.9 of aggrgates

3.  0.5 of sand

So if we take cost of cement as 100 dollar per unit and aggregate 15 dollar per unit and sand 5 dollar per unit then the cost of RCC per CMT will be as follow;

100 * 8 + 15 * 0.9 + 5 * 0.5 = 816

Please send us a template if possible.

Thank you.