In the interest of efficiency and economy, one department, agency, or fund, may supply services, materials, or equipment to another department, agency, or fund upon request; and an amount equalling the cost of such services or materials, depreciated value of equipment or reasonable rental charge thereof, shall be transferred from the recipient of the services, materials or equipment to the provider, and such funds shall be added to the appropriate appropriation item and be available for re-expenditure in like manner as though appropriated. No such transaction shall be carried over from one fiscal year to another. No employee shall suffer any reduction in compensation as a result of the application of the provisions of this section.