(a) Contract rents. HUD will calculate contract rent adjustments based on the sum of the project's operating costs and debt service (as calculated by HUD), with adjustments for vacancies, the project's nonrental income, and other factors that HUD deems appropriate. The calculation will be made on the basis of information provided by the Borrower on a form prescribed by HUD.

(b) Rent for unassisted units. The rent payable by families occupying units or residential spaces that are not assisted under the PAC shall be equal to the contract rent computed under paragraph (a) of this section.