Cost Calculation process of usage and miscellaneous transactions

 Hi Folks,

Could some one explain me the business example for following examples of costing user guide.

Calculating Cost for Usages and Miscellaneous Transactions

Oracle Projects calculates the cost for usages and miscellaneous transactions as follows:

• Raw cost is equal to quantity (if quantity is in currency, for example, a currency

amount), or alternatively, raw cost is the result of multiplying quantity by a rate (if

quantity is not in currency). You can define cost rates for usage and miscellaneous

costs as follows:

• cost rates by expenditure type

• cost rates by non-labor resource and owning organization for usages (optional);

overrides expenditure type cost rate