The daily, weekly, and monthly rate quoted, unless otherwise noted, will be based on maximum usage of eight (8) hours per day; forty (40) hours per week; or one hundred sixty (160) hours per month. All use in excess thereof, and all transportation, fuel, theft, EPP, damage charges and related charges shall be paid by the renter in addition to initial charges. Monthly rentals are calculated as 4 weeks or 28 days.